CVE-2021-20285

NameCVE-2021-20285
DescriptionA flaw was found in upx canPack in p_lx_elf.cpp in UPX 3.96. This flaw allows attackers to cause a denial of service (SEGV or buffer overflow and application crash) or possibly have unspecified other impacts via a crafted ELF. The highest threat from this vulnerability is to system availability.
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
upx-ucl (PTS)jessie3.91-1vulnerable
stretch3.91-4vulnerable
buster3.95-1vulnerable
bullseye3.96-2vulnerable
sid, trixie4.2.2-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
upx-uclsource(unstable)4.2.2-1unimportant

Notes

https://github.com/upx/upx/issues/421
https://github.com/upx/upx/commit/13bc031163863cb3866aa6cdc018dff0697aa5d4 (v3.99)

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