CVE-2016-2161

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 21.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-07-27 · updated 2026-06-17
Weakness: CWE-823

Description

In Apache HTTP Server versions 2.4.0 to 2.4.23, malicious input to mod_auth_digest can cause the server to crash, and each instance continues to crash even for subsequently valid requests.

Affected products

Apache HTTP Server: 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.4.6, 2.4.7 (+11)

References

http://rhn.redhat.com/errata/RHSA-2017-1415.html
http://www.debian.org/security/2017/dsa-3796
http://www.securityfocus.com/bid/95076
http://www.securitytracker.com/id/1037508
https://access.redhat.com/errata/RHSA-2017:0906
https://access.redhat.com/errata/RHSA-2017:1161
https://access.redhat.com/errata/RHSA-2017:1413
https://access.redhat.com/errata/RHSA-2017:1414
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03725en_us
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-2161
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E

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