Headline
Gentoo Linux Security Advisory 202210-32
Gentoo Linux Security Advisory 202210-32 - An integer overflow has been found in hiredis which could result in arbitrary code execution. Versions less than 1.0.1 are affected.
Gentoo Linux Security Advisory GLSA 202210-32
https://security.gentoo.org/
Severity: Normal
Title: hiredis, hiredis-py: Multiple Vulnerabilities
Date: October 31, 2022
Bugs: #873079, #816318
ID: 202210-32
Synopsis
An integer overflow has been found in hiredis which could result in
arbitrary code execution.
Background
hiredis is a minimalistic C client library for the Redis database.
hiredis-py is a Python extension that wraps hiredis.
Affected packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/hiredis < 1.0.1 >= 1.0.1
2 dev-python/hiredis < 2.0.0 >= 2.0.0
Description
Hiredis is vulnerable to integer overflow if provided maliciously
crafted or corrupted RESP mult-bulk protocol data. When parsing
multi-bulk (array-like) replies, hiredis fails to check if count * sizeof(redisReply*) can be represented in SIZE_MAX. If it can not,
and the calloc() call doesn’t itself make this check, it would result
in a short allocation and subsequent buffer overflow.
Impact
Malicious Redis commands could result in remote code execution.
Workaround
There is no known workaround at this time.
Resolution
All hiredis users should upgrade to the latest version:
emerge --sync
emerge --ask --oneshot --verbose “>=dev-libs/hiredis-1.0.1”
All hiredis-py users should upgrade to the latest version:
emerge --sync
emerge --ask --oneshot --verbose “>=dev-python/hiredis-2.0.0”
References
[ 1 ] CVE-2021-32765
https://nvd.nist.gov/vuln/detail/CVE-2021-32765
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202210-32
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
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
Copyright 2022 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5
Related news
Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count * sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-array-elements) context option to a value small enough that no overflow is possible.