import mod_auth_mellon-0.14.0-9.el8
This commit is contained in:
CentOS Sources
parent
525e98697a
commit
b4731cd814
44
SOURCES/0002-Fix-redirect-URL-validation-bypass.patch
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44
SOURCES/0002-Fix-redirect-URL-validation-bypass.patch
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From 62041428a32de402e0be6ba45fe12df6a83bedb8 Mon Sep 17 00:00:00 2001
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From: Olav Morken <olav.morken@uninett.no>
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Date: Tue, 19 Mar 2019 13:42:22 +0100
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Subject: [PATCH] Fix redirect URL validation bypass
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It turns out that browsers silently convert backslash characters into
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forward slashes, while apr_uri_parse() does not.
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This mismatch allows an attacker to bypass the redirect URL validation
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by using an URL like:
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https://sp.example.org/mellon/logout?ReturnTo=https:%5c%5cmalicious.example.org/
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mod_auth_mellon will assume that it is a relative URL and allow the
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request to pass through, while the browsers will use it as an absolute
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url and redirect to https://malicious.example.org/ .
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This patch fixes this issue by rejecting all redirect URLs with
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backslashes.
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---
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auth_mellon_util.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/auth_mellon_util.c b/auth_mellon_util.c
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index 0fab309..fd442f9 100644
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--- a/auth_mellon_util.c
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+++ b/auth_mellon_util.c
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@@ -927,6 +927,13 @@ int am_check_url(request_rec *r, const char *url)
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"Control character detected in URL.");
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return HTTP_BAD_REQUEST;
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}
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+ if (*i == '\\') {
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+ /* Reject backslash character, as it can be used to bypass
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+ * redirect URL validation. */
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+ AM_LOG_RERROR(APLOG_MARK, APLOG_ERR, HTTP_BAD_REQUEST, r,
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+ "Backslash character detected in URL.");
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+ return HTTP_BAD_REQUEST;
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+ }
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}
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return OK;
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--
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2.19.2
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@ -0,0 +1,172 @@
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diff -up mod_auth_mellon-0.14.0/auth_mellon_cache.c.env_prefix mod_auth_mellon-0.14.0/auth_mellon_cache.c
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--- mod_auth_mellon-0.14.0/auth_mellon_cache.c.env_prefix 2017-10-02 11:44:08.000000000 +0200
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+++ mod_auth_mellon-0.14.0/auth_mellon_cache.c 2019-06-10 09:46:36.806014513 +0200
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@@ -589,7 +589,7 @@ void am_cache_env_populate(request_rec *
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*/
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for(i = 0; i < t->size; ++i) {
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varname = am_cache_entry_get_string(t, &t->env[i].varname);
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- varname_prefix = "MELLON_";
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+ varname_prefix = d->env_prefix;
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/* Check if we should map this name into another name. */
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env_varname_conf = (am_envattr_conf_t *)apr_hash_get(
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diff -up mod_auth_mellon-0.14.0/auth_mellon_config.c.env_prefix mod_auth_mellon-0.14.0/auth_mellon_config.c
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--- mod_auth_mellon-0.14.0/auth_mellon_config.c.env_prefix 2018-03-16 08:14:54.000000000 +0100
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+++ mod_auth_mellon-0.14.0/auth_mellon_config.c 2019-06-10 09:46:36.807014516 +0200
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@@ -36,6 +36,11 @@ static const char *default_endpoint_path
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*/
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static const char *default_user_attribute = "NAME_ID";
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+/* This is the default prefix to use for attributes received from the
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+ * server. Customizable using the MellonEnvPrefix option
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+ */
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+static const char *default_env_prefix = "MELLON_";
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+
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/* This is the default name of the cookie which mod_auth_mellon will set.
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* If you change this, then you should also update the description of the
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* MellonVar configuration directive.
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@@ -1372,8 +1377,10 @@ const command_rec auth_mellon_commands[]
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am_set_setenv_slot,
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NULL,
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OR_AUTHCFG,
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- "Renames attributes received from the server while retaining prefix MELLON_. The format is"
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- " MellonSetEnv <old name> <new name>."
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+ "Renames attributes received from the server while retaining the"
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+ " prefix. The prefix defaults to MELLON_ but can be changed with"
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+ " MellonEnvPrefix."
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+ " The format is MellonSetEnv <old name> <new name>."
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),
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AP_INIT_TAKE2(
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"MellonSetEnvNoPrefix",
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@@ -1383,6 +1390,13 @@ const command_rec auth_mellon_commands[]
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"Renames attributes received from the server without adding prefix. The format is"
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" MellonSetEnvNoPrefix <old name> <new name>."
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),
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+ AP_INIT_TAKE1(
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+ "MellonEnvPrefix",
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+ ap_set_string_slot,
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+ (void *)APR_OFFSETOF(am_dir_cfg_rec, env_prefix),
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+ OR_AUTHCFG,
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+ "The prefix to use for attributes received from the server."
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+ ),
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AP_INIT_FLAG(
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"MellonSessionDump",
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ap_set_flag_slot,
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@@ -1714,6 +1728,7 @@ void *auth_mellon_dir_config(apr_pool_t
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dir->cookie_path = NULL;
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dir->cookie_samesite = am_samesite_default;
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dir->envattr = apr_hash_make(p);
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+ dir->env_prefix = default_env_prefix;
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dir->userattr = default_user_attribute;
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dir->idpattr = NULL;
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dir->signature_method = inherit_signature_method;
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@@ -1868,6 +1883,10 @@ void *auth_mellon_dir_merge(apr_pool_t *
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add_cfg->envattr :
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base_cfg->envattr);
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+ new_cfg->env_prefix = (add_cfg->env_prefix != default_env_prefix ?
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+ add_cfg->env_prefix :
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+ base_cfg->env_prefix);
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+
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new_cfg->userattr = (add_cfg->userattr != default_user_attribute ?
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add_cfg->userattr :
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base_cfg->userattr);
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diff -up mod_auth_mellon-0.14.0/auth_mellon_diagnostics.c.env_prefix mod_auth_mellon-0.14.0/auth_mellon_diagnostics.c
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--- mod_auth_mellon-0.14.0/auth_mellon_diagnostics.c.env_prefix 2018-03-16 08:14:54.000000000 +0100
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+++ mod_auth_mellon-0.14.0/auth_mellon_diagnostics.c 2019-06-10 09:46:36.808014518 +0200
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@@ -442,6 +442,9 @@ am_diag_log_dir_cfg(request_rec *r, int
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"%sMellonCookieSameSite (cookie_samesite): %s\n",
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indent(level+1),
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am_diag_samesite_str(r, cfg->cookie_samesite));
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+ apr_file_printf(diag_cfg->fd,
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+ "%sMellonEnvPrefix (env_prefix): %s\n",
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+ indent(level+1), cfg->env_prefix);
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apr_file_printf(diag_cfg->fd,
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"%sMellonCond (cond): %d items\n",
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@@ -466,7 +469,7 @@ am_diag_log_dir_cfg(request_rec *r, int
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apr_hash_this(hash_item, (void *)&key, NULL, (void *)&envattr_conf);
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if (envattr_conf->prefixed) {
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- name = apr_pstrcat(r->pool, "MELLON_",
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+ name = apr_pstrcat(r->pool, cfg->env_prefix,
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envattr_conf->name, NULL);
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} else {
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name = envattr_conf->name;
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diff -up mod_auth_mellon-0.14.0/auth_mellon.h.env_prefix mod_auth_mellon-0.14.0/auth_mellon.h
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--- mod_auth_mellon-0.14.0/auth_mellon.h.env_prefix 2018-03-16 08:14:54.000000000 +0100
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+++ mod_auth_mellon-0.14.0/auth_mellon.h 2019-06-10 09:46:36.805014510 +0200
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@@ -237,6 +237,7 @@ typedef struct am_dir_cfg_rec {
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am_samesite_t cookie_samesite;
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apr_array_header_t *cond;
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apr_hash_t *envattr;
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+ const char *env_prefix;
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const char *userattr;
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const char *idpattr;
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LassoSignatureMethod signature_method;
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diff -up mod_auth_mellon-0.14.0/doc/user_guide/mellon_user_guide.adoc.env_prefix mod_auth_mellon-0.14.0/doc/user_guide/mellon_user_guide.adoc
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--- mod_auth_mellon-0.14.0/doc/user_guide/mellon_user_guide.adoc.env_prefix 2018-03-16 08:14:54.000000000 +0100
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+++ mod_auth_mellon-0.14.0/doc/user_guide/mellon_user_guide.adoc 2019-06-10 09:48:08.422237471 +0200
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@@ -2007,11 +2007,13 @@ attributes.
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assertion to a name of your choosing when it is placed in the Apache
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environment. This is controlled by `MellonSetEnv` and
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`MellonSetEnvNoPrefix` directives. The distinction
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- is `MellonSetEnv` always prepends the `MELLON_` prefix to the
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+ is `MellonSetEnv` always prepends a prefix to the
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environment variable name to help to prevent name collisions. The
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+ prefix defaults to `MELLON_` and can be configured using the
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+ `MellonEnvPrefix` configuration option. The
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`MellonSetEnvNoPrefix` directive also remaps the assertion name to a
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name of your choosing but it omits prepending the environment
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- variable name with `MELLON_`. See <<map_assertion_attr_name>>
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+ variable name with the prefix. See <<map_assertion_attr_name>>
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Using the <<assertion_response,assertion example>> Mellon places these
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environment variables in the Apache environment. See
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@@ -2096,10 +2098,12 @@ and `MellonSetEnvNoPrefix` directives. T
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assertion attribute to a name of your choosing. The `MellonSetEnv`
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directive follows the same convention as all other assertion
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attributes added by Mellon in that it always prefixes the environment
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-variable name with `MELLON_` to help avoid name collisions in the
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+variable name with a configurable prefix, which defaults to `MELLON_` to help avoid name collisions in the
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Apache environment. However sometimes you do not want the `MELLON_`
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-prefix added and instead you want to use exactly the environment
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-variable name as specified., `MellonSetEnvNoPrefix` serves this role.
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+prefix added. In case you simply want the variables prefixed with
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+a different string, use the `MellonEnvPrefix` configuration option. If,
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+instead you want to use exactly the environment variable name as specified.,
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+`MellonSetEnvNoPrefix` serves this role.
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To illustrate let's look at an example. Suppose your web app is
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expecting an attribute which is the user's last name, specifically it
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@@ -2117,6 +2121,15 @@ MellonSetEnvNoPrefix REMOTE_USER_LASTNAM
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Also see <<set_remote_user>> for an example of setting the `REMOTE_USER`
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environment variable using `MellonSetEnvNoPrefix`.
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+The `MellonEnvPrefix` variable might be useful e.g. if you
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+are migrating from a different SP which used its own prefix
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+for the variables passed by the IdP. For example, to prefix
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+all variables with `NOLLEM_` you would use:
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+
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+----
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+MellonEnvPrefix NOLLEM_
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+----
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+
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=== Using Mellon to apply constraints [[assertion_constraints]]
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SAML attributes can be used for more than exporting those values to a
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diff -up mod_auth_mellon-0.14.0/README.md.env_prefix mod_auth_mellon-0.14.0/README.md
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--- mod_auth_mellon-0.14.0/README.md.env_prefix 2018-03-16 08:14:54.000000000 +0100
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+++ mod_auth_mellon-0.14.0/README.md 2019-06-10 09:46:36.805014510 +0200
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@@ -253,6 +253,11 @@ MellonDiagnosticsEnable Off
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# Default. None set.
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MellonSetEnvNoPrefix "DISPLAY_NAME" "displayName"
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+ # MellonEnvPrefix changes the string the variables passed from the
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+ # IdP are prefixed with.
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+ # Default: MELLON_
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+ MellonEnvPrefix "NOLLEM_"
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+
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# MellonMergeEnvVars merges multiple values of environment variables
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# set using MellonSetEnv into single variable:
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# ie: MYENV_VAR => val1;val2;val3 instead of default behaviour of:
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@ -1,7 +1,7 @@
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Summary: A SAML 2.0 authentication module for the Apache Httpd Server
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Summary: A SAML 2.0 authentication module for the Apache Httpd Server
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Name: mod_auth_mellon
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Name: mod_auth_mellon
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Version: 0.14.0
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Version: 0.14.0
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Release: 3%{?dist}.2
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Release: 9%{?dist}
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Group: System Environment/Daemons
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Group: System Environment/Daemons
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Source0: https://github.com/UNINETT/mod_auth_mellon/releases/download/v%{version}/%{name}-%{version}.tar.gz
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Source0: https://github.com/UNINETT/mod_auth_mellon/releases/download/v%{version}/%{name}-%{version}.tar.gz
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Source1: auth_mellon.conf
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Source1: auth_mellon.conf
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@ -23,6 +23,8 @@ Requires: lasso >= 2.5.1
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Url: https://github.com/UNINETT/mod_auth_mellon
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Url: https://github.com/UNINETT/mod_auth_mellon
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Patch0001: 0001-Modify-am_handler-setup-to-run-before-mod_proxy.patch
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Patch0001: 0001-Modify-am_handler-setup-to-run-before-mod_proxy.patch
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Patch0002: 0002-Fix-redirect-URL-validation-bypass.patch
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Patch0003: 0003-backport-Make-the-environment-variable-prefix-configurable.patch
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# FIXME: RHEL-7 does not have rubygem-asciidoctor, only asciidoc. However,
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# FIXME: RHEL-7 does not have rubygem-asciidoctor, only asciidoc. However,
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# I could not get asciidoc to render properly so instead I generated
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# I could not get asciidoc to render properly so instead I generated
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@ -38,6 +40,8 @@ received in assertions generated by a IdP server.
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%prep
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%prep
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%setup -q -n %{name}-%{version}
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%setup -q -n %{name}-%{version}
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%patch1 -p1
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%patch1 -p1
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%patch2 -p1
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%patch3 -p1
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%build
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%build
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export APXS=%{_httpd_apxs}
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export APXS=%{_httpd_apxs}
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@ -105,12 +109,35 @@ in the doc directory for instructions on using the diagnostics build.
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%{_httpd_moddir}/mod_auth_mellon.so
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%{_httpd_moddir}/mod_auth_mellon.so
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%{_tmpfilesdir}/mod_auth_mellon.conf
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%{_tmpfilesdir}/mod_auth_mellon.conf
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%{_libexecdir}/%{name}
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%{_libexecdir}/%{name}
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%dir /run/%{name}/
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%attr(0755,apache,apache) %dir /run/%{name}/
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%changelog
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%changelog
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* Tue Apr 16 2019 Jakub Hrozek <jhrozek@redhat.com> - 0.14.0-3.2
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* Thu Jun 13 2019 Jakub Hrozek <jhrozek@redhat.com> - 0.14.0-9
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- Resolves: rhbz#1696197 - CVE-2019-3878 mod_auth_mellon: authentication
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- Just bump the release number
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bypass in ECP flow [rhel-8.0.0.z]
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- Related: rhbz#1718238 - mod_auth_mellon-diagnostics RPM not in product
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listings
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* Fri Jun 7 2019 Jakub Hrozek <jhrozek@redhat.com> - 0.14.0-8
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- Resolves: rhbz#1691894 - [RFE] Config option to change mod_auth_mellon prefix
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* Fri Jun 7 2019 Jakub Hrozek <jhrozek@redhat.com> - 0.14.0-7
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- Apply the patch from the previous commit
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- Resolves: rhbz#1692471 - CVE-2019-3877 appstream/mod_auth_mellon: open
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redirect in logout url when using URLs with
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backslashes [rhel-8]
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* Fri Jun 7 2019 Jakub Hrozek <jhrozek@redhat.com> - 0.14.0-6
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- Resolves: rhbz#1692471 - CVE-2019-3877 appstream/mod_auth_mellon: open
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redirect in logout url when using URLs with
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backslashes [rhel-8]
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* Fri Jun 7 2019 Jakub Hrozek <jhrozek@redhat.com> - 0.14.0-5
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- Resolves: rhbz#1692457 - CVE-2019-3878 mod_auth_mellon: authentication
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bypass in ECP flow [rhel-8.1.0]
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* Wed Apr 24 2019 Jakub Hrozek <jhrozek@redhat.com> - 0.14.0-4
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- Resolves: rhbz#1702695 - fresh install of mod_auth_mellon shows rpm
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verification warnings
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* Mon Jul 30 2018 Florian Weimer <fweimer@redhat.com> - 0.14.0-3
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* Mon Jul 30 2018 Florian Weimer <fweimer@redhat.com> - 0.14.0-3
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- Rebuild with fixed binutils
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- Rebuild with fixed binutils
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