CVE-2021-3657

NameCVE-2021-3657
DescriptionA flaw was found in mbsync versions prior to 1.4.4. Due to inadequate handling of extremely large (>=2GiB) IMAP literals, malicious or compromised IMAP servers, and hypothetically even external email senders, could cause several different buffer overflows, which could conceivably be exploited for remote code execution.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3066-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
isync (PTS)buster1.3.0-2.2~deb10u1vulnerable
bullseye1.3.0-2.2+deb11u1fixed
bookworm, sid1.4.4-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
isyncsourcestretch1.2.1-2+deb9u1DLA-3066-1
isyncsourcebullseye1.3.0-2.2+deb11u1
isyncsource(unstable)1.4.4-1

Notes

[buster] - isync <no-dsa> (Minor issue)
https://www.openwall.com/lists/oss-security/2021/12/03/1

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