The BEGIN regular expression in the awk script detector in magic/Magdir/commands in file before 5.15 uses multiple wildcards with unlimited repetitions, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted ASCII file that triggers a large amount of backtracking, as demonstrated via a file with many newline characters.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| File | Christos_zoulas | * | 5.15 (excluding) |
| Red Hat Enterprise Linux 7 | RedHat | php-0:5.4.16-23.el7_0 | * |
| Red Hat Software Collections 1 for Red Hat Enterprise Linux 6 | RedHat | php54-php-0:5.4.16-22.el6 | * |
| Red Hat Software Collections 1 for Red Hat Enterprise Linux 6.4 EUS | RedHat | php54-php-0:5.4.16-22.el6 | * |
| Red Hat Software Collections 1 for Red Hat Enterprise Linux 6.5 EUS | RedHat | php54-php-0:5.4.16-22.el6 | * |
| Red Hat Software Collections 1 for Red Hat Enterprise Linux 6.6 EUS | RedHat | php54-php-0:5.4.16-22.el6 | * |
| Red Hat Software Collections 1 for Red Hat Enterprise Linux 7 | RedHat | php54-php-0:5.4.16-22.el7 | * |
| File | Ubuntu | esm-infra-legacy/trusty | * |
| File | Ubuntu | lucid | * |
| File | Ubuntu | precise | * |
| File | Ubuntu | quantal | * |
| File | Ubuntu | saucy | * |
| File | Ubuntu | trusty | * |
| File | Ubuntu | trusty/esm | * |
References
- http://bugs.gw.com/view.php?id=164
- http://rhn.redhat.com/errata/RHSA-2014-1765.html
- http://support.apple.com/kb/HT6443
- http://www.debian.org/security/2014/dsa-2873
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=703993
- https://github.com/file/file/commit/ef2329cf71acb59204dd981e2c6cce6c81fe467c
- http://bugs.gw.com/view.php?id=164
- http://rhn.redhat.com/errata/RHSA-2014-1765.html
- http://support.apple.com/kb/HT6443
- http://www.debian.org/security/2014/dsa-2873
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=703993
- https://github.com/file/file/commit/ef2329cf71acb59204dd981e2c6cce6c81fe467c