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Debian DLA-2783-1 : hiredis - LTS security update

high Nessus Plugin ID 154021

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2783 advisory.

 - 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. (CVE-2021-32765)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the hiredis packages.

For Debian 9 Stretch, these problems have been fixed in version 0.13.3-1+deb9u1.

See Also

https://www.debian.org/lts/security/2021/dla-2783

https://security-tracker.debian.org/tracker/CVE-2021-32765

https://packages.debian.org/source/stretch/hiredis

Plugin Details

Severity: High

ID: 154021

File Name: debian_DLA-2783.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/12/2021

Updated: 10/12/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS Score Source: CVE-2021-32765

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libhiredis-dbg, p-cpe:/a:debian:debian_linux:libhiredis-dev, p-cpe:/a:debian:debian_linux:libhiredis0.13, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2021

Vulnerability Publication Date: 10/4/2021

Reference Information

CVE: CVE-2021-32765