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Gentoo: GLSA-202406-04 Normal: LZ4 Memory Corruption Risk

gentoo
Calendar Grey June 22, 2024
Dist Gentoo Esm H88
Critical LZ4 memory flaw identified in Gentoo advisory GLSA 202406-04. Urgent patch advised for impacted users.
A vulnerability has been discovered in LZ4, which can lead to memory corruption.

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.

Topics%20covered

Topics Covered

security advisory gentoo memory corruption integer overflow normal severity crash risk lz4

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
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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.

Severity: Normal
Title: LZ4: Memory Corruption
Date: June 22, 2024
Bugs: #791952
ID: 202406-04

Topics%20covered

Topics Covered

security advisory gentoo memory corruption integer overflow normal severity crash risk lz4

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.

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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.

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