Red Hat Bugzilla – Bug 681982
CVE-2011-1072 php-pear: symlink vulnerability in PEAR installer
Last modified: 2012-10-04 11:14:01 EDT
Common Vulnerabilities and Exposures assigned an identifier CVE-2011-1072 to the following vulnerability: Name: CVE-2011-1072 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1072 Assigned: 20110224 Reference: http://openwall.com/lists/oss-security/2011/02/28/3 Reference: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=546164 Reference: http://news.php.net/php.pear.cvs/61264 Reference: http://pear.php.net/advisory-20110228.txt Reference: http://pear.php.net/bugs/bug.php?id=18056 Reference: http://security-tracker.debian.org/tracker/CVE-2011-1072 Reference: http://svn.php.net/viewvc?view=revision&revision=308687 Reference: http://www.securityfocus.com/bid/46605 Reference: http://secunia.com/advisories/43533 Reference: http://xforce.iss.net/xforce/xfdb/65721 The installer in PEAR before 1.9.2 allows local users to overwrite arbitrary files via a symlink attack on the package.xml file, related to the (1) download_dir, (2) cache_dir, (3) tmp_dir, and (4) pear-build-download directories, a different vulnerability than CVE-2007-2519. Note that PEAR 1.9.2 did not fully correct the issue, and MITRE assigned CVE-2011-1144 to that: The installer in PEAR 1.9.2 and earlier allows local users to overwrite arbitrary files via a symlink attack on the package.xml file, related to the (1) download_dir, (2) cache_dir, (3) tmp_dir, and (4) pear-build-download directories. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-1072. References to the incomplete fix: http://openwall.com/lists/oss-security/2011/03/01/9 So if we do update to 1.9.2 without the full fix, then CVE-2011-1144 applies as 1.9.2 contains an incomplete fix. It also does not look like older versions of PEAR (e.g. 1.4.9 as found in Red Hat Enterprise Linux 5) are vulnerable as there is no specific download directory or temporary directory specifications used (download_dir, temp_dir), and the default cache directory is /var/cache/php-pear which is owned root:root and mode 0755 (not a world-writable /tmp).
Created php-pear tracking bugs for this issue Affects: fedora-all [bug 681983]
This has been further fixed upstream (so this would be the fix for CVE-2011-1144): http://svn.php.net/viewvc?view=revision&revision=309042 This, in addition to the previous changes, would be required to fully fix CVE-2011-1072.
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2011:1741 https://rhn.redhat.com/errata/RHSA-2011-1741.html