Descriptionrsync 3.1.3-development before 2017-10-24 mishandles archaic checksums, which makes it easier for remote attackers to bypass intended access restrictions. NOTE: the rsync development branch has significant use beyond the rsync developers, e.g., the code has been copied for use in various GitHub projects.
SourceCVE (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 PackageReleaseVersionStatus
rsync (PTS)bullseye3.2.3-4+deb11u1fixed
sid, trixie3.3.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
rsyncsource(unstable)(not affected)


- rsync <not-affected> (Problematic code to allow checksum choice only introduced after 3.1.2 release);a=commit;h=7b8a4ecd6ff9cdf4e5d3850ebf822f1e989255b3;a=commit;h=9a480deec4d20277d8e20bc55515ef0640ca1e55;a=commit;h=c252546ceeb0925eb8a4061315e3ff0a8c55b48b
And possibly the following two commits on top:;a=commit;h=bc112b0e7feece62ce98708092306639a8a53cce;a=commit;h=416e719bea4f5466c8dd2b34cac0059b6ff84ff3
The following commit introduced special handling of archaic versions / handling of
--checksum-choice option to choose the checksum algorithms:;a=commit;h=a5a7d3a297b836387b0ac677383bdddaf2ac3598

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