Description
The sdump function in sdump.c in fetchmail 6.3.11, 6.3.12, and 6.3.13, when running in verbose mode on platforms for which char is signed, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an SSL X.509 certificate containing non-printable characters with the high bit set, which triggers a heap-based buffer overflow during escaping.
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 | fetchmail | 6.3.13-2 | — |
| Debian 13 | fetchmail | 6.3.13-2 | — |
| Debian 12 | fetchmail | 6.3.13-2 | — |
References
- MDVSA-2010:037 vendor-advisory
- http://www.fetchmail.info/fetchmail-SA-2010-01.txt
- 38088 vdb-entry
- http://mknod.org/svn/fetchmail/branches/BRANCH_6-3/fetchmail-SA-2010-01.txt
- 1023543 vdb-entry
- 38391 third-party-advisory
- 62114 vdb-entry
- ADV-2010-0296 vdb-entry