Gentoo: GLSA-202406-04: LZ4: Memory CorruptionSecurity Advisory Updates
Summary
An attacker who submits a crafted file to an application linked with lz4
may be able to trigger an integer overflow, leading to calling of
memmove() on a negative size argument, causing an out-of-bounds write
and/or a crash.
Resolution
All LZ4 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/lz4-1.9.3-r1"
References
[ 1 ] CVE-2021-3520
https://nvd.nist.gov/vuln/detail/CVE-2021-3520
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202406-04
Concerns
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
Synopsis
A vulnerability has been discovered in LZ4, which can lead to memory
corruption.
Background
LZ4 is a lossless compression algorithm, providing compression speed >
500 MB/s per core, scalable with multi-cores CPU. It features an
extremely fast decoder, with speed in multiple GB/s per core, typically
reaching RAM speed limits on multi-core systems.
Affected Packages
Package Vulnerable Unaffected
------------ ------------ ------------
app-arch/lz4 < 1.9.3-r1 >= 1.9.3-r1
Impact
The greatest impact of this flaw is to availability, with some potential
impact to confidentiality and integrity as well.
Workaround
There is no known workaround at this time.
