[pl/f16] Fix CVE-2012-6090
Petr Pisar
ppisar at fedoraproject.org
Fri Jan 4 12:59:53 UTC 2013
commit 23f22f86e0f169333f53bd49c9985437e7257649
Author: Petr Písař <ppisar at redhat.com>
Date: Fri Jan 4 12:53:27 2013 +0100
Fix CVE-2012-6090
pl-5.10.2-CVE-2012-6090.patch | 119 +++++++++++++++++++++++++++++++++++++++++
pl.spec | 5 ++
2 files changed, 124 insertions(+), 0 deletions(-)
---
diff --git a/pl-5.10.2-CVE-2012-6090.patch b/pl-5.10.2-CVE-2012-6090.patch
new file mode 100644
index 0000000..1fc0210
--- /dev/null
+++ b/pl-5.10.2-CVE-2012-6090.patch
@@ -0,0 +1,119 @@
+From 212e2fcac834dec25a4fa0f4fd4652bfd19cdeea Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar at redhat.com>
+Date: Fri, 4 Jan 2013 13:35:27 +0100
+Subject: [PATCH 2/2] Fix CVE-2012-6090
+
+Upstream fix ported to 5.10.2:
+
+From b2c88972e7515ada025e97e7d3ce3e34f81cf33e Mon Sep 17 00:00:00 2001
+From: Jan Wielemaker <J.Wielemaker at cs.vu.nl>
+Date: Sun, 16 Dec 2012 17:29:37 +0100
+Subject: [PATCH] SECURITY: Possible buffer overflows when expanding
+ file-names with long paths. Affects expand_file_name/2.
+
+Can lead to crashes (DoS attacks) and possibly execution of arbitrary
+code if an attacker can control the names of the files searched for,
+e.g., if expand_file_name/2 is used in a directory to which an attacker
+can upload files for which he can control the name.
+---
+ src/pl-glob.c | 46 ++++++++++++++++++++++++++++------------------
+ 1 file changed, 28 insertions(+), 18 deletions(-)
+
+diff --git a/src/pl-glob.c b/src/pl-glob.c
+index 417a69c..1fad6ca 100644
+--- a/src/pl-glob.c
++++ b/src/pl-glob.c
+@@ -423,6 +423,7 @@ expand(const char *pattern, GlobInfo info)
+ compiled_pattern cbuf;
+ char prefix[MAXPATHLEN]; /* before first pattern */
+ char patbuf[MAXPATHLEN]; /* pattern buffer */
++ size_t prefix_len;
+ int end, dot;
+
+ initBuffer(&info->files);
+@@ -441,20 +442,25 @@ expand(const char *pattern, GlobInfo info)
+ switch( (c=*s++) )
+ { case EOS:
+ if ( s > pat ) /* something left and expanded */
+- { un_escape(prefix, pat, s);
++ { size_t prefix_len;
++
++ un_escape(prefix, pat, s);
++ prefix_len = strlen(prefix);
+
+ end = info->end;
+ for( ; info->start < end; info->start++ )
+ { char path[MAXPATHLEN];
+- size_t plen;
+-
+- strcpy(path, expand_entry(info, info->start));
+- plen = strlen(path);
+- if ( prefix[0] && plen > 0 && path[plen-1] != '/' )
+- path[plen++] = '/';
+- strcpy(&path[plen], prefix);
+- if ( end == 1 || AccessFile(path, ACCESS_EXIST) )
+- add_path(path, info);
++ const char *entry = expand_entry(info, info->start);
++ size_t plen = strlen(entry);
++
++ if ( plen+prefix_len+2 <= MAXPATHLEN )
++ { strcpy(path, entry);
++ if ( prefix[0] && plen > 0 && path[plen-1] != '/' )
++ path[plen++] = '/';
++ strcpy(&path[plen], prefix);
++ if ( end == 1 || AccessFile(path, ACCESS_EXIST) )
++ add_path(path, info);
++ }
+ }
+ }
+ succeed;
+@@ -489,8 +495,9 @@ expand(const char *pattern, GlobInfo info)
+ */
+ un_escape(prefix, pat, head);
+ un_escape(patbuf, head, tail);
++ prefix_len = strlen(prefix);
+
+- if ( !compilePattern(patbuf, &cbuf) ) /* syntax error */
++ if ( !compilePattern(patbuf, &cbuf) ) /* syntax error */
+ fail;
+ dot = (patbuf[0] == '.'); /* do dots as well */
+
+@@ -502,12 +509,16 @@ expand(const char *pattern, GlobInfo info)
+ char path[MAXPATHLEN];
+ char tmp[MAXPATHLEN];
+ const char *current = expand_entry(info, info->start);
++ size_t clen = strlen(current);
++
++ if ( clen+prefix_len+1 > sizeof(path) )
++ continue;
+
+ strcpy(path, current);
+- strcat(path, prefix);
++ strcpy(&path[clen], prefix);
+
+ if ( (d=opendir(path[0] ? OsPath(path, tmp) : ".")) )
+- { size_t plen = strlen(path);
++ { size_t plen = clen+prefix_len;
+
+ if ( plen > 0 && path[plen-1] != '/' )
+ path[plen++] = '/';
+@@ -521,12 +532,11 @@ expand(const char *pattern, GlobInfo info)
+ matchPattern(e->d_name, &cbuf) )
+ { char newp[MAXPATHLEN];
+
+- strcpy(newp, path);
+- strcpy(&newp[plen], e->d_name);
+-/* if ( !tail[0] || ExistsDirectory(newp) )
+- Saves memory, but involves one more file-access
+-*/
++ if ( plen+strlen(e->d_name)+1 < sizeof(newp) )
++ { strcpy(newp, path);
++ strcpy(&newp[plen], e->d_name);
+ add_path(newp, info);
++ }
+ }
+ }
+ closedir(d);
+--
+1.7.11.7
+
diff --git a/pl.spec b/pl.spec
index bf8e962..ae7c3fa 100644
--- a/pl.spec
+++ b/pl.spec
@@ -40,6 +40,8 @@ Patch9: xpce-5.10.5-SECURITY-Bug-9-Loading-incomplete-GIF-files-causes-a.pat
Patch10: xpce-5.10.5-SECURITY-Make-sure-all-pixels-are-within-the-allocat.patch
# Fix CVE-2012-6089, in upstream 6.2.5, rhbz#891666
Patch11: %{name}-5.10.2-CVE-2012-6089.patch
+# Fix CVE-2012-6090, in upstream 6.2.5, bug #891666
+Patch12: %{name}-5.10.2-CVE-2012-6090.patch
BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
# Base
@@ -159,6 +161,7 @@ cd packages/xpce
%patch10 -p1 -b .validate_pixel_color
)
%patch11 -p1 -b .CVE-2012-6089
+%patch12 -p1 -b .CVE-2012-6090
(
cd src
autoconf
@@ -344,6 +347,8 @@ rm -rf $RPM_BUILD_ROOT
%changelog
* Fri Jan 04 2013 Petr Pisar <ppisar at redhat.com> - 5.10.2-9
- Fix CVE-2012-6089 (buffer overflows in path canonisation code) (bug #891666)
+- Fix CVE-2012-6090 (buffer overflows when expanding file-names with long
+ paths) (bug #891666)
* Thu Mar 08 2012 Petr Pisar <ppisar at redhat.com> - 5.10.2-8
- Fix JPL interface (bug #590499)
More information about the scm-commits
mailing list