Description
server/action.py in Fail2ban before 0.8.8 does not properly handle the content of the matches tag, which might allow remote attackers to trigger unsafe behavior in a custom action file via unspecified symbols in this content.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | fail2ban | 0.8.6-3wheezy1 | — |
| Debian 13 | fail2ban | 0.8.6-3wheezy1 | — |
| Debian 12 | fail2ban | 0.8.6-3wheezy1 | — |
References
- [oss-security] 20121217 Re: CVE request: fail2ban 0.8.8 fixes an input variable quoting flaw on <matches> content mailing-list
- https://github.com/fail2ban/fail2ban/commit/83109bc
- [fail2ban-users] 20121206 0.8.8 release mailing-list
- https://raw.github.com/fail2ban/fail2ban/master/ChangeLog
- https://bugs.gentoo.org/show_bug.cgi?id=447572
- openSUSE-SU-2013:0567 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=887914
- MDVSA-2013:078 vendor-advisory
- openSUSE-SU-2013:0566 vendor-advisory