rsync: avoid infinite wait reading secrets file.

CVE-2014-2855
This commit is contained in:
Jan S 2014-04-21 21:53:11 +02:00
parent 4b2af699b5
commit e5f170269f
2 changed files with 86 additions and 1 deletions

View file

@ -0,0 +1,84 @@
From 0dedfbce2c1b851684ba658861fe9d620636c56a Mon Sep 17 00:00:00 2001
From: Wayne Davison <wayned@samba.org>
Date: Sun, 13 Apr 2014 13:44:58 -0700
Subject: [PATCH] Avoid infinite wait reading secrets file.
---
authenticate.c | 24 +++++++++++++-----------
1 files changed, 13 insertions(+), 11 deletions(-)
diff --git a/authenticate.c b/authenticate.c
index 3381b8c..c92746c 100644
--- a/authenticate.c
+++ b/authenticate.c
@@ -102,15 +102,16 @@ static const char *check_secret(int module, const char *user, const char *group,
char pass2[MAX_DIGEST_LEN*2];
const char *fname = lp_secrets_file(module);
STRUCT_STAT st;
- int fd, ok = 1;
+ int ok = 1;
int user_len = strlen(user);
int group_len = group ? strlen(group) : 0;
char *err;
+ FILE *fh;
- if (!fname || !*fname || (fd = open(fname, O_RDONLY)) < 0)
+ if (!fname || !*fname || (fh = fopen(fname, "r")) == NULL)
return "no secrets file";
- if (do_fstat(fd, &st) == -1) {
+ if (do_fstat(fileno(fh), &st) == -1) {
rsyserr(FLOG, errno, "fstat(%s)", fname);
ok = 0;
} else if (lp_strict_modes(module)) {
@@ -123,29 +124,30 @@ static const char *check_secret(int module, const char *user, const char *group,
}
}
if (!ok) {
- close(fd);
+ fclose(fh);
return "ignoring secrets file";
}
if (*user == '#') {
/* Reject attempt to match a comment. */
- close(fd);
+ fclose(fh);
return "invalid username";
}
/* Try to find a line that starts with the user (or @group) name and a ':'. */
err = "secret not found";
- while ((user || group) && read_line_old(fd, line, sizeof line, 1)) {
- const char **ptr, *s;
+ while ((user || group) && fgets(line, sizeof line, fh) != NULL) {
+ const char **ptr, *s = strtok(line, "\n\r");
int len;
- if (*line == '@') {
+ if (!s)
+ continue;
+ if (*s == '@') {
ptr = &group;
len = group_len;
- s = line+1;
+ s++;
} else {
ptr = &user;
len = user_len;
- s = line;
}
if (!*ptr || strncmp(s, *ptr, len) != 0 || s[len] != ':')
continue;
@@ -158,7 +160,7 @@ static const char *check_secret(int module, const char *user, const char *group,
*ptr = NULL; /* Don't look for name again. */
}
- close(fd);
+ fclose(fh);
memset(line, 0, sizeof line);
memset(pass2, 0, sizeof pass2);
--
1.7.0.4

View file

@ -1,7 +1,7 @@
# Template file for 'rsync' # Template file for 'rsync'
pkgname=rsync pkgname=rsync
version=3.1.0 version=3.1.0
revision=2 revision=3
build_style=gnu-configure build_style=gnu-configure
hostmakedepends="perl" hostmakedepends="perl"
makedepends="zlib-devel acl-devel popt-devel" makedepends="zlib-devel acl-devel popt-devel"
@ -11,3 +11,4 @@ license="GPL-3"
homepage="http://samba.anu.edu.au/rsync/" homepage="http://samba.anu.edu.au/rsync/"
distfiles="http://www.samba.org/ftp/rsync/src/rsync-$version.tar.gz" distfiles="http://www.samba.org/ftp/rsync/src/rsync-$version.tar.gz"
checksum=81ca23f77fc9b957eb9845a6024f41af0ff0c619b7f38576887c63fa38e2394e checksum=81ca23f77fc9b957eb9845a6024f41af0ff0c619b7f38576887c63fa38e2394e
patch_args="-p1"