Resource exhaustion in Apache Subversion
CVE-2016-8734
Apache Subversion's mod_dontdothat module and HTTP clients 1.4.0 through 1.8.16, and 1.9.0 through 1.9.4 are vulnerable to a denial-of-service attack caused by exponential XML entity expansion. The attack can cause the targeted process to consume an excessive amount of CPU resources or memory.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.064 (93.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.064 · newest: 0.064 · change: 0.000
Affected products
- Apache Subversion — versions 1.4.0, 1.4.1, 1.4.2
- Apache Software Foundation Subversion — versions 1.9.0 to 1.9.4, 1.4.0 to 1.8.16
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/94588 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.apache.org/thread.html/7798f5cda1b2a3c70db4be77694b12dec8fcc1a441b00009d4… (mailing-list)
- www.securitytracker.com/id/1037361 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3932 (vendor-advisory, Third Party Advisory)
- www.oracle.com/security-alerts/cpuoct2020.html
- subversion.apache.org/security/CVE-2016-8734-advisory.txt (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2016-8734?
- CVE-2016-8734 is a medium-severity vulnerability in Apache Subversion, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2017-10-16.
- How severe is CVE-2016-8734?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2016-8734 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.