Vulnerability in Apache HTTP Server
CVE-2020-11985
IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules, an attacker could spoof their IP address for logging and PHP scripts. Note this issue was fixed in Apache HTTP Server 2.4.24 but was retrospectively allocated a low severity CVE in 2020.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.070 (94.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.068 · newest: 0.070 · change: +0.002
Affected products
- Apache HTTP Server
- Apache HTTP Server — versions 2.4.1 to 2.4.23
Weakness classification (CWE)
Public proof-of-concept exploits
References
- httpd.apache.org/security/vulnerabilities_24.html (Vendor Advisory)
- security.gentoo.org/glsa/202008-04 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.oracle.com/security-alerts/cpujan2021.html
- security.netapp.com/advisory/ntap-20200827-0002/
- lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af… (mailing-list)
- lists.apache.org/thread.html/r09bb998baee74a2c316446bd1a41ae7f8d7049d09d9ff9914… (mailing-list)
- lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea46… (mailing-list)
- lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef… (mailing-list)
Frequently asked questions
- What is CVE-2020-11985?
- CVE-2020-11985 is a medium-severity vulnerability in Apache HTTP Server, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.3/10. Published 2020-08-07.
- How severe is CVE-2020-11985?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2020-11985 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.