The try_read_command function in memcached.c in memcached before 1.4.39 allows remote attackers to cause a denial of service (segmentation…

Description

The try_read_command function in memcached.c in memcached before 1.4.39 allows remote attackers to cause a denial of service (segmentation fault) via a request to add/set a key, which makes a comparison between signed and unsigned int and triggers a heap-based buffer over-read. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-8705.

Scores

EPSS (exploitation in 30 days)

4.2% · top 9.1% of all CVEs (3 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• n/a

Affected products

• n/a

  • affected n/a

References (6)

• USN-3588-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• https://github.com/memcached/memcached/wiki/ReleaseNotes1439 (opens in a new tab)x_refsource_MISCx_transferred
• 99874 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• DSA-4218 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• https://www.twistlock.com/2017/07/13/cve-2017-9951-heap-overflow-memcached-server-1-4-38-twistlock-vulnerability-report/ (opens in a new tab)x_refsource_MISCx_transferred
• https://groups.google.com/forum/message/raw?msg=memcached/ubGWrkmrr4E/nrm1SeVJAQAJ (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2017-9951](https://trackcve.app/badge/CVE-2017-9951.svg)](https://trackcve.app/cve/CVE-2017-9951)

Record last updated 5 Aug 2024, 17:24 UTC.