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Vulnerability DatabaseCVE-2023-46852

CVE-2023-46852: 
Memcached vulnerability analysis and mitigation

Overview

A buffer overflow vulnerability (CVE-2023-46852) was discovered in Memcached versions before 1.6.22. The vulnerability exists when processing multiget requests in proxy mode, specifically when there are many spaces after the 'get' substring (NVD).

Technical details

The vulnerability is classified as a classic buffer overflow (CWE-120) with a CVSS v3.1 base score of 7.5 (HIGH), and vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The issue occurs when processing requests with excessive spaces after the 'get' command in proxy mode. The exploit requires the request before the first newline to be less than 1024 bytes, with a limit of 100 spaces, and key length checked at 250 bytes (GitHub Patch).

Impact

A remote attacker could potentially exploit this vulnerability to cause Memcached to crash, resulting in a denial of service, or possibly execute arbitrary code (Ubuntu Security).

Mitigation and workarounds

The vulnerability has been fixed in Memcached version 1.6.22. The fix caps the amount of data pre-key to be reasonable, limiting it to 20 bytes. Users are advised to upgrade to this version or later (Debian Security).

Additional resources

Source: This report was generated using AI

Related Memcached vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2023-46853CRITICAL9.8
  • MemcachedMemcached
  • cpe:2.3:a:memcached:memcached
NoYesOct 27, 2023
CVE-2023-46852HIGH7.5
  • MemcachedMemcached
  • memcached-debuginfo
NoYesOct 27, 2023
CVE-2022-48571HIGH7.5
  • MemcachedMemcached
  • memcached
NoYesAug 22, 2023
CVE-2020-22570HIGH7.5
  • MemcachedMemcached
  • memcached
NoYesAug 22, 2023
CVE-2021-37519MEDIUM5.5
  • MemcachedMemcached
  • memcached
NoYesFeb 03, 2023

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