Description
lib/logmatcher.c in Balabit syslog-ng before 3.2.4, when the global flag is set and when using PCRE 8.12 and possibly other versions, allows remote attackers to cause a denial of service (memory consumption) via a message that does not match a regular expression.
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 | syslog-ng | 3.2.4-1 | — |
| Debian 13 | syslog-ng | 3.2.4-1 | — |
| Debian 12 | syslog-ng | 3.2.4-1 | — |
References
- http://git.balabit.hu/?p=bazsi/syslog-ng-3.2.git%3Ba=commit%3Bh=09710c0b105e579d35c7b5f6c66d1ea5e3a3d3ff
- https://bugzilla.redhat.com/show_bug.cgi?id=709088
- [oss-security] 20110526 CVE Request -- syslog-ng -- Possible DoS mailing-list
- FEDORA-2011-8405 vendor-advisory
- 47800 vdb-entry
- 45122 third-party-advisory