CVE-2021-3578

NameCVE-2021-3578
DescriptionA flaw was found in mbsync before v1.3.6 and v1.4.2, where an unchecked pointer cast allows a malicious or compromised server to write an arbitrary integer value past the end of a heap-allocated structure by issuing an unexpected APPENDUID response. This could be plausibly exploited for remote code execution on the client.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3066-1
Debian Bugs989564

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
isync (PTS)buster1.3.0-2.2~deb10u2fixed
bullseye1.3.0-2.2+deb11u1fixed
bookworm, sid, trixie1.4.4-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
isyncsourcestretch1.2.1-2+deb9u1DLA-3066-1
isyncsourcebuster1.3.0-2.2~deb10u1
isyncsource(unstable)1.3.0-2.2989564

Notes

https://www.openwall.com/lists/oss-security/2021/06/07/1

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