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Backport file handling code from rpm-4.19 

Fixes CVE-2021-35937, CVE-2021-35938 and CVE-2021-35939

Patches include small changes found in other patches. See RHEL-8.10
patch set for intermediate steps.

Resolves: RHEL-14598 RHEL-14599 RHEL-14600
This commit is contained in:
Florian Festi 2023-10-14 13:17:55 +02:00
parent f3da53eb6d
commit 94360abd84
6 changed files with 2031 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

107
0001-Add-optional-callback-on-directory-changes-during-rp.patch Normal file
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@ -0,0 +1,107 @@
From 186e0ab025b9ad92d900697f611633a6f6162f3b Mon Sep 17 00:00:00 2001
From: Panu Matilainen <pmatilai@redhat.com>
Date: Wed, 9 Feb 2022 14:47:14 +0200
Subject: [PATCH] Add optional callback on directory changes during rpmfi
iteration
Internal only for now in case we need to fiddle with the API some more,
but no reason this couldn't be made public later.
---
lib/rpmfi.c | 24 ++++++++++++++++++++----
lib/rpmfi_internal.h | 17 +++++++++++++++++
2 files changed, 37 insertions(+), 4 deletions(-)
diff --git a/lib/rpmfi.c b/lib/rpmfi.c
index aec8220a3..6c631fdb5 100644
--- a/lib/rpmfi.c
+++ b/lib/rpmfi.c
@@ -53,6 +53,9 @@ struct rpmfi_s {
int intervalStart; /*!< Start of iterating interval. */
int intervalEnd; /*!< End of iterating interval. */
+ rpmfiChdirCb onChdir; /*!< Callback for directory changes */
+ void *onChdirData; /*!< Caller private callback data */
+
rpmfiles files; /*!< File info set */
rpmcpio_t archive; /*!< Archive with payload */
unsigned char * found; /*!< Bit field of files found in the archive */
@@ -298,11 +301,16 @@ rpm_count_t rpmfiDC(rpmfi fi)
return (fi != NULL ? rpmfilesDC(fi->files) : 0);
}
-#ifdef NOTYET
-int rpmfiDI(rpmfi fi)
+int rpmfiSetOnChdir(rpmfi fi, rpmfiChdirCb cb, void *data)
{
+ int rc = -1;
+ if (fi != NULL) {
+ fi->onChdir = cb;
+ fi->onChdirData = data;
+ rc = 0;
+ }
+ return rc;
}
-#endif
int rpmfiFX(rpmfi fi)
{
@@ -314,9 +322,17 @@ int rpmfiSetFX(rpmfi fi, int fx)
int i = -1;
if (fi != NULL && fx >= 0 && fx < rpmfilesFC(fi->files)) {
+ int dx = fi->j;
i = fi->i;
fi->i = fx;
fi->j = rpmfilesDI(fi->files, fi->i);
+ i = fi->i;
+
+ if (fi->j != dx && fi->onChdir) {
+ int chrc = fi->onChdir(fi, fi->onChdirData);
+ if (chrc < 0)
+ i = chrc;
+ }
}
return i;
}
@@ -1682,9 +1698,9 @@ static rpmfi initIter(rpmfiles files, int itype, int link)
if (files && itype>=0 && itype<=RPMFILEITERMAX) {
fi = xcalloc(1, sizeof(*fi));
fi->i = -1;
+ fi->j = -1;
fi->files = link ? rpmfilesLink(files) : files;
fi->next = nextfuncs[itype];
- fi->i = -1;
if (itype == RPMFI_ITER_BACK) {
fi->i = rpmfilesFC(fi->files);
} else if (itype >=RPMFI_ITER_READ_ARCHIVE
diff --git a/lib/rpmfi_internal.h b/lib/rpmfi_internal.h
index dccc6ccbe..37f1d45f5 100644
--- a/lib/rpmfi_internal.h
+++ b/lib/rpmfi_internal.h
@@ -13,6 +13,23 @@
extern "C" {
#endif
+/** \ingroup rpmfi
+ * Callback on file iterator directory changes
+ * @param fi file info
+ * @param data caller private callback data
+ * @return 0 on success, < 0 on error (to stop iteration)
+ */
+typedef int (*rpmfiChdirCb)(rpmfi fi, void *data);
+
+/** \ingroup rpmfi
+ * Set a callback for directory changes during iteration.
+ * @param fi file info
+ * @param cb callback function
+ * @param data caller private callback data
+ * @return string pool handle (weak reference)
+ */
+int rpmfiSetOnChdir(rpmfi fi, rpmfiChdirCb cb, void *data);
+
/** \ingroup rpmfi
* Return file info set string pool handle
* @param fi file info
--
2.41.0

35
0001-Eliminate-code-duplication-from-rpmfiNext.patch Normal file
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@ -0,0 +1,35 @@
From 0bc13d75b5883ccf4d6579f7a60fb1badd104649 Mon Sep 17 00:00:00 2001
From: Panu Matilainen <pmatilai@redhat.com>
Date: Thu, 10 Feb 2022 10:23:22 +0200
Subject: [PATCH] Eliminate code duplication from rpmfiNext()
Now that we can, let rpmfiSetFX() take care of the details.
---
lib/rpmfi.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/lib/rpmfi.c b/lib/rpmfi.c
index 689ead2c5..aec8220a3 100644
--- a/lib/rpmfi.c
+++ b/lib/rpmfi.c
@@ -856,15 +856,8 @@ int rpmfiNext(rpmfi fi)
next = fi->next(fi);
} while (next == RPMERR_ITER_SKIP);
- if (next >= 0 && next < rpmfilesFC(fi->files)) {
- fi->i = next;
- fi->j = rpmfilesDI(fi->files, fi->i);
- } else {
- fi->i = -1;
- if (next >= 0) {
- next = -1;
- }
- }
+ if (next >= 0)
+ next = rpmfiSetFX(fi, next);
}
return next;
}
--
2.41.0

158
0001-Pass-file-descriptor-to-file-prepare-plugin-hook-use.patch Normal file
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@ -0,0 +1,158 @@
From ac7b0dbd5a18d2c57a942ca14ac856b8047425ff Mon Sep 17 00:00:00 2001
From: Panu Matilainen <pmatilai@redhat.com>
Date: Tue, 15 Feb 2022 10:43:13 +0200
Subject: [PATCH] Pass file descriptor to file prepare plugin hook, use when
possible
Sadly the thing that allegedly makes things better mostly just makes
things more complicated as symlinks can't be opened, so we'll now have
to deal with both cases in plugins too. To make matters worse, most
APIs out there support either an fd or a path, but very few support
the *at() style dirfd + basename approach so plugins are stuck with
absolute paths for now.
This is of course a plugin API/ABI change too.
---
lib/rpmplugin.h | 2 +-
lib/rpmplugins.c | 4 ++--
lib/rpmplugins.h | 3 ++-
plugins/ima.c | 9 +++++++--
plugins/selinux.c | 13 ++++++++-----
5 files changed, 20 insertions(+), 11 deletions(-)
diff --git a/lib/rpmplugin.h b/lib/rpmplugin.h
index fd81aec8d..fab4b3e83 100644
--- a/lib/rpmplugin.h
+++ b/lib/rpmplugin.h
@@ -57,7 +57,7 @@ typedef rpmRC (*plugin_fsm_file_post_func)(rpmPlugin plugin, rpmfi fi,
const char* path, mode_t file_mode,
rpmFsmOp op, int res);
typedef rpmRC (*plugin_fsm_file_prepare_func)(rpmPlugin plugin, rpmfi fi,
- const char* path,
+ int fd, const char* path,
const char *dest,
mode_t file_mode, rpmFsmOp op);
diff --git a/lib/rpmplugins.c b/lib/rpmplugins.c
index 65e684e84..923084b78 100644
--- a/lib/rpmplugins.c
+++ b/lib/rpmplugins.c
@@ -384,7 +384,7 @@ rpmRC rpmpluginsCallFsmFilePost(rpmPlugins plugins, rpmfi fi, const char *path,
}
rpmRC rpmpluginsCallFsmFilePrepare(rpmPlugins plugins, rpmfi fi,
- const char *path, const char *dest,
+ int fd, const char *path, const char *dest,
mode_t file_mode, rpmFsmOp op)
{
plugin_fsm_file_prepare_func hookFunc;
@@ -394,7 +394,7 @@ rpmRC rpmpluginsCallFsmFilePrepare(rpmPlugins plugins, rpmfi fi,
for (i = 0; i < plugins->count; i++) {
rpmPlugin plugin = plugins->plugins[i];
RPMPLUGINS_SET_HOOK_FUNC(fsm_file_prepare);
- if (hookFunc && hookFunc(plugin, fi, path, dest, file_mode, op) == RPMRC_FAIL) {
+ if (hookFunc && hookFunc(plugin, fi, fd, path, dest, file_mode, op) == RPMRC_FAIL) {
rpmlog(RPMLOG_ERR, "Plugin %s: hook fsm_file_prepare failed\n", plugin->name);
rc = RPMRC_FAIL;
}
diff --git a/lib/rpmplugins.h b/lib/rpmplugins.h
index 39762c376..ddf5d7048 100644
--- a/lib/rpmplugins.h
+++ b/lib/rpmplugins.h
@@ -156,6 +156,7 @@ rpmRC rpmpluginsCallFsmFilePost(rpmPlugins plugins, rpmfi fi, const char* path,
* permissions etc, but before committing file to destination path.
* @param plugins plugins structure
* @param fi file info iterator (or NULL)
+ * @param fd file descriptor (or -1 if not available)
* @param path file object current path
* @param dest file object destination path
* @param mode file object mode
@@ -164,7 +165,7 @@ rpmRC rpmpluginsCallFsmFilePost(rpmPlugins plugins, rpmfi fi, const char* path,
*/
RPM_GNUC_INTERNAL
rpmRC rpmpluginsCallFsmFilePrepare(rpmPlugins plugins, rpmfi fi,
- const char *path, const char *dest,
+ int fd, const char *path, const char *dest,
mode_t mode, rpmFsmOp op);
#ifdef __cplusplus
diff --git a/plugins/ima.c b/plugins/ima.c
index fe6d3ad7f..9c28a41a3 100644
--- a/plugins/ima.c
+++ b/plugins/ima.c
@@ -39,7 +39,7 @@ static int check_zero_hdr(const unsigned char *fsig, size_t siglen)
return (memcmp(fsig, &zero_hdr, sizeof(zero_hdr)) == 0);
}
-static rpmRC ima_fsm_file_prepare(rpmPlugin plugin, rpmfi fi,
+static rpmRC ima_fsm_file_prepare(rpmPlugin plugin, rpmfi fi, int fd,
const char *path,
const char *dest,
mode_t file_mode, rpmFsmOp op)
@@ -68,8 +68,13 @@
fsig = rpmfiFSignature(fi, &len);
if (fsig && (check_zero_hdr(fsig, len) == 0)) {
- if (lsetxattr(path, XATTR_NAME_IMA, fsig, len, 0) < 0) {
- int is_err = errno != EOPNOTSUPP;
+ int xx;
+ if (fd >= 0)
+ xx = fsetxattr(fd, XATTR_NAME_IMA, fsig, len, 0);
+ else
+ xx = lsetxattr(path, XATTR_NAME_IMA, fsig, len, 0);
+ if (xx < 0) {
+ int is_err = xx != EOPNOTSUPP;
rpmlog(is_err?RPMLOG_ERR:RPMLOG_DEBUG,
"ima: could not apply signature on '%s': %s\n",
path, strerror(errno));
diff --git a/plugins/fapolicyd.c b/plugins/fapolicyd.c
index 7ac44f0d0..1ff50c30f 100644
--- a/plugins/fapolicyd.c
+++ b/plugins/fapolicyd.c
@@ -145,7 +145,8 @@ static rpmRC fapolicyd_scriptlet_pre(rpmPlugin plugin, const char *s_name,
}
static rpmRC fapolicyd_fsm_file_prepare(rpmPlugin plugin, rpmfi fi,
- const char *path, const char *dest,
+ int fd, const char *path,
+ const char *dest,
mode_t file_mode, rpmFsmOp op)
{
/* not ready */
diff --git a/plugins/selinux.c b/plugins/selinux.c
index 32c3b7529..a7f20aeca 100644
--- a/plugins/selinux.c
+++ b/plugins/selinux.c
@@ -149,7 +149,7 @@ static rpmRC selinux_scriptlet_fork_post(rpmPlugin plugin,
return rc;
}
-static rpmRC selinux_fsm_file_prepare(rpmPlugin plugin, rpmfi fi,
+static rpmRC selinux_fsm_file_prepare(rpmPlugin plugin, rpmfi fi, int fd,
const char *path, const char *dest,
mode_t file_mode, rpmFsmOp op)
{
@@ -194,13 +194,17 @@
if (sehandle && !XFA_SKIPPING(action)) {
char *scon = NULL;
if (selabel_lookup_raw(sehandle, &scon, dest, file_mode) == 0) {
- int conrc = lsetfilecon(path, scon);
+ int conrc;
+ if (fd >= 0)
+ conrc = fsetfilecon(fd, scon);
+ else
+ conrc = lsetfilecon(path, scon);
if (conrc == 0 || (conrc < 0 && errno == EOPNOTSUPP))
rc = RPMRC_OK;
- rpmlog(loglvl(rc != RPMRC_OK), "lsetfilecon: (%s, %s) %s\n",
- path, scon, (conrc < 0 ? strerror(errno) : ""));
+ rpmlog(loglvl(rc != RPMRC_OK), "lsetfilecon: (%d %s, %s) %s\n",
+ fd, path, scon, (conrc < 0 ? strerror(errno) : ""));
freecon(scon);
} else {
--
2.41.0

90
0001-Swap-over-to-dirfd-basename-based-operation-within-t.patch Normal file
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@ -0,0 +1,90 @@
From 6dd62720fe84f7e2ad902c915b952fc0b29e3dcd Mon Sep 17 00:00:00 2001
From: Panu Matilainen <pmatilai@redhat.com>
Date: Tue, 15 Feb 2022 11:34:37 +0200
Subject: [PATCH] Swap over to dirfd+basename based operation within the fsm
Within fsm this is just a matter of adjusting error messages to include
the directory... if it only wasn't for the plugins requiring absolute
paths for outside users. For the plugins, we need to assemble absolute
paths as needed, both in ensureDir() and plugin file slots.
---
lib/rpmplugins.c | 20 +++++++++++++++++---
2 files changed, 36 insertions(+), 14 deletions(-)
diff --git a/lib/rpmplugins.c b/lib/rpmplugins.c
index 703368c0d..f06fd7895 100644
--- a/lib/rpmplugins.c
+++ b/lib/rpmplugins.c
@@ -350,21 +350,31 @@ rpmRC rpmpluginsCallScriptletPost(rpmPlugins plugins, const char *s_name, int ty
return rc;
}
+static char *abspath(rpmfi fi, const char *path)
+{
+ if (*path == '/')
+ return xstrdup(path);
+ else
+ return rstrscat(NULL, rpmfiDN(fi), path, NULL);
+}
+
rpmRC rpmpluginsCallFsmFilePre(rpmPlugins plugins, rpmfi fi, const char *path,
mode_t file_mode, rpmFsmOp op)
{
plugin_fsm_file_pre_func hookFunc;
int i;
rpmRC rc = RPMRC_OK;
+ char *apath = abspath(fi, path);
for (i = 0; i < plugins->count; i++) {
rpmPlugin plugin = plugins->plugins[i];
RPMPLUGINS_SET_HOOK_FUNC(fsm_file_pre);
- if (hookFunc && hookFunc(plugin, fi, path, file_mode, op) == RPMRC_FAIL) {
+ if (hookFunc && hookFunc(plugin, fi, apath, file_mode, op) == RPMRC_FAIL) {
rpmlog(RPMLOG_ERR, "Plugin %s: hook fsm_file_pre failed\n", plugin->name);
rc = RPMRC_FAIL;
}
}
+ free(apath);
return rc;
}
@@ -375,14 +385,16 @@ rpmRC rpmpluginsCallFsmFilePost(rpmPlugins plugins, rpmfi fi, const char *path,
plugin_fsm_file_post_func hookFunc;
int i;
rpmRC rc = RPMRC_OK;
+ char *apath = abspath(fi, path);
for (i = 0; i < plugins->count; i++) {
rpmPlugin plugin = plugins->plugins[i];
RPMPLUGINS_SET_HOOK_FUNC(fsm_file_post);
- if (hookFunc && hookFunc(plugin, fi, path, file_mode, op, res) == RPMRC_FAIL) {
+ if (hookFunc && hookFunc(plugin, fi, apath, file_mode, op, res) == RPMRC_FAIL) {
rpmlog(RPMLOG_WARNING, "Plugin %s: hook fsm_file_post failed\n", plugin->name);
}
}
+ free(apath);
return rc;
}
@@ -394,15 +406,17 @@ rpmRC rpmpluginsCallFsmFilePrepare(rpmPlugins plugins, rpmfi fi,
plugin_fsm_file_prepare_func hookFunc;
int i;
rpmRC rc = RPMRC_OK;
+ char *apath = abspath(fi, path);
for (i = 0; i < plugins->count; i++) {
rpmPlugin plugin = plugins->plugins[i];
RPMPLUGINS_SET_HOOK_FUNC(fsm_file_prepare);
- if (hookFunc && hookFunc(plugin, fi, fd, path, dest, file_mode, op) == RPMRC_FAIL) {
+ if (hookFunc && hookFunc(plugin, fi, fd, apath, dest, file_mode, op) == RPMRC_FAIL) {
rpmlog(RPMLOG_ERR, "Plugin %s: hook fsm_file_prepare failed\n", plugin->name);
rc = RPMRC_FAIL;
}
}
+ free(apath);
return rc;
}
--
2.41.0

1631
0001-Use-file-state-machine-from-rpm-4.19.patch Normal file
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File diff suppressed because it is too large Load Diff

11
rpm.spec
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@ -32,7 +32,7 @@
%global rpmver 4.16.1.3
#global snapver rc1
%global rel 25
%global rel 26
%global sover 9
%global srcver %{rpmver}%{?snapver:-%{snapver}}
@ -94,6 +94,12 @@ Patch122: rpm-4.16.1.3-Support-long-languages-names-for-QT.patch
Patch123: rpm-4.14.3-rpm2archive-parse-popt-options.patch
Patch124: rpm-4.14.3-rpm2archive-Don-t-print-usage.patch
Patch125: rpm-4.16.1.3-IMA-without-xattr.patch
# Backport fsm to fix CVEs
Patch126: 0001-Eliminate-code-duplication-from-rpmfiNext.patch
Patch127: 0001-Add-optional-callback-on-directory-changes-during-rp.patch
Patch128: 0001-Pass-file-descriptor-to-file-prepare-plugin-hook-use.patch
Patch129: 0001-Swap-over-to-dirfd-basename-based-operation-within-t.patch
Patch130: 0001-Use-file-state-machine-from-rpm-4.19.patch
# These are not yet upstream
Patch906: rpm-4.7.1-geode-i686.patch
@ -643,6 +649,9 @@ fi
%doc doc/librpm/html/*
%changelog
* Fri Nov 10 2023 Florian Festi <ffesti@redhat.com> - 4.16.1.3-26
- Backport file handling code from rpm-4.19 to fix CVE-2021-35937,
CVE-2021-35938 and CVE-2021-35939
* Fri Jun 30 2023 Florian Festi <ffesti@redhat.com> - 4.16.1.3-25
- Followup on #2166383