| Name | CVE-2021-36386 |
| Description | report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic platform results in an impact beyond an inconvenience to the client user. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| fetchmail (PTS) | jessie | 6.3.26-1 | vulnerable |
| stretch | 6.3.26-3 | vulnerable |
| buster | 6.4.0~beta4-3+deb10u1 | vulnerable |
| bullseye | 6.4.16-4+deb11u1 | fixed |
| bookworm | 6.4.37-1 | fixed |
| sid, trixie | 6.4.39-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| fetchmail | source | (unstable) | 6.4.16-4 | unimportant | | |
Notes
https://www.fetchmail.info/fetchmail-SA-2021-01.txt
Fixed by: https://gitlab.com/fetchmail/fetchmail/-/commit/c546c8299243a10a7b85c638e0e61396ecd5d8b5 (RELEASE_6-4-20)
Regression fix: https://gitlab.com/fetchmail/fetchmail/-/commit/d3db2da1d13bd2419370ad96defb92eecb17064c (RELEASE_6-4-21)
Negligible security impact