| Name | CVE-2021-44143 |
| Description | A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 999804 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| isync (PTS) | buster | 1.3.0-2.2~deb10u2 | fixed |
| bullseye | 1.3.0-2.2+deb11u1 | fixed |
| sid, trixie, bookworm | 1.4.4-5 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| isync | source | stretch | (not affected) | | | |
| isync | source | buster | (not affected) | | | |
| isync | source | bullseye | (not affected) | | | |
| isync | source | (unstable) | 1.4.4-1 | | | 999804 |
Notes
[bullseye] - isync <not-affected> (Vulnerable code introduced later)
[buster] - isync <not-affected> (Vulnerable code introduced later)
[stretch] - isync <not-affected> (Vulnerable code introduced later)
https://www.openwall.com/lists/oss-security/2021/12/03/2