CVE-2017-9951

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://www.securityfocus.com/bid/99874
https://github.com/memcached/memcached/wiki/ReleaseNotes1439Third Party Advisory
https://groups.google.com/forum/message/raw?msg=memcached/ubGWrkmrr4E/nrm1SeVJAQAJMailing List, Third Party Advisory
https://usn.ubuntu.com/3588-1/
https://www.debian.org/security/2018/dsa-4218
https://www.twistlock.com/2017/07/13/cve-2017-9951-heap-overflow-memcached-server-1-4-38-twistlock-vulnerability-report/Exploit, Technical Description, Third Party Advisory
http://www.securityfocus.com/bid/99874
https://github.com/memcached/memcached/wiki/ReleaseNotes1439Third Party Advisory
https://groups.google.com/forum/message/raw?msg=memcached/ubGWrkmrr4E/nrm1SeVJAQAJMailing List, Third Party Advisory
https://usn.ubuntu.com/3588-1/
https://www.debian.org/security/2018/dsa-4218
https://www.twistlock.com/2017/07/13/cve-2017-9951-heap-overflow-memcached-server-1-4-38-twistlock-vulnerability-report/Exploit, Technical Description, Third Party Advisory

Timeline

Published: Jul 17, 2017
Last modified: Jun 17, 2026
NVD status: Modified

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