Debian dla-4791 : memcached - security update

critical Nessus Plugin ID 349140

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 12 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4791 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4791-1 [email protected] https://www.debian.org/lts/security/ Abhijith PA September 23, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : memcached Version : 1.6.18-1+deb12u1 CVE ID : CVE-2023-46852 CVE-2023-46853 CVE-2026-47783 CVE-2026-47784

Multiple vulnerabilities were found in memcached, high-performance in-memory object caching system.

CVE-2023-46852

a buffer overflow exists when processing multiget requests in proxy mode, if there are many spaces after the get substring

CVE-2023-46853

an off-by-one error exists when processing proxy requests in proxy mode, if \n is used instead of \r\n.

CVE-2026-47783

username data for SASL password database authentication has a timing side channel because a loop exits as soon as a valid username is found by sasl_server_userdb_checkpass.

CVE-2026-47784

password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_userdb_checkpass.

For Debian 12 bookworm, these problems have been fixed in version 1.6.18-1+deb12u1.

We recommend that you upgrade your memcached packages.

For the detailed security status of memcached please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/memcached

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

Solution

Upgrade the memcached packages.

Plugin Details

Severity: Critical

ID: 349140

File Name: debian_DLA-4791.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 9/23/2026

Updated: 9/23/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.84

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2023-46853

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:memcached

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/23/2026

Vulnerability Publication Date: 10/27/2023

Reference Information

CVE: CVE-2023-46852, CVE-2023-46853, CVE-2026-47783, CVE-2026-47784

Detections

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