DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs999804

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
isync (PTS)bullseye1.3.0-2.2+deb11u1fixed
sid, trixie, bookworm1.4.4-5fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
isyncsourcestretch(not affected)
isyncsourcebuster(not affected)
isyncsourcebullseye(not affected)


[bullseye] - isync <not-affected> (Vulnerable code introduced later)
[buster] - isync <not-affected> (Vulnerable code introduced later)
[stretch] - isync <not-affected> (Vulnerable code introduced later)

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