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Gentoo Linux Security Advisory                           GLSA 202210-32
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: hiredis, hiredis-py: Multiple Vulnerabilities
     Date: October 31, 2022
     Bugs: #873079, #816318
       ID: 202210-32

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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
security@gentoo.org 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