Improper input validation in Apache HTTP Server
CVE-2016-2161
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.210 (97.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.210 · newest: 0.210 · change: 0.000
Affected products
- Apache HTTP Server — versions 2.4.0, 2.4.1, 2.4.2
- Apache Software Foundation HTTP Server — versions 2.4.0 to 2.4.23
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.apple.com/HT208221
- www.securityfocus.com/bid/95076 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3796 (vendor-advisory)
- www.securitytracker.com/id/1037508 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2017:1413 (vendor-advisory)
- access.redhat.com/errata/RHSA-2017:1161 (vendor-advisory)
- www.tenable.com/security/tns-2017-04
- access.redhat.com/errata/RHSA-2017:1414 (vendor-advisory)
- h20566.www2.hpe.com/hpsc/doc/public/display (Third Party Advisory)
- httpd.apache.org/security/vulnerabilities_24.html (Vendor Advisory)
Frequently asked questions
- What is CVE-2016-2161?
- CVE-2016-2161 is a high-severity vulnerability in Apache HTTP Server, classified under CWE-823. CVSS score: 7.5/10. Published 2017-07-27.
- How severe is CVE-2016-2161?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-2161 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.