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Correctly report invalid key permissions (#1801459)

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This commit is contained in:
Jakub Jelen 2020-02-17 11:57:35 +01:00
parent a2cffc6e9b
commit 2b86acd332
1 changed files with 17 additions and 12 deletions
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25
openssh-6.6p1-keyperm.patch
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@ -1,8 +1,7 @@
diff --git a/authfile.c b/authfile.c
index e93d867..4fc5b3d 100644
--- a/authfile.c
+++ b/authfile.c
@@ -32,6 +32,7 @@
diff -up openssh-8.2p1/authfile.c.keyperm openssh-8.2p1/authfile.c
--- openssh-8.2p1/authfile.c.keyperm 2020-02-14 01:40:54.000000000 +0100
+++ openssh-8.2p1/authfile.c 2020-02-17 11:55:12.841729758 +0100
@@ -31,6 +31,7 @@
#include <errno.h>
#include <fcntl.h>
@ -10,17 +9,23 @@ index e93d867..4fc5b3d 100644
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
@@ -207,6 +208,13 @@ sshkey_perm_ok(int fd, const char *filename)
@@ -101,7 +102,19 @@ sshkey_perm_ok(int fd, const char *filen
#ifdef HAVE_CYGWIN
if (check_ntsec(filename))
#endif
+
if ((st.st_uid == getuid()) && (st.st_mode & 077) != 0) {
+ if (st.st_mode & 040) {
+ struct group *gr;
+
+ if ((gr = getgrnam("ssh_keys")) && (st.st_gid == gr->gr_gid))
+ st.st_mode &= ~040;
+ if ((gr = getgrnam("ssh_keys")) && (st.st_gid == gr->gr_gid)) {
+ /* The only additional bit is read
+ * for ssh_keys group, which is fine */
+ if ((st.st_mode & 077) == 040 ) {
+ return 0;
+ }
+ }
+ }
+
if ((st.st_uid == getuid()) && (st.st_mode & 077) != 0) {
error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
error("@ WARNING: UNPROTECTED PRIVATE KEY FILE! @");
error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");