Resource exhaustion in Apache Traffic Server
CVE-2019-9513
Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree. This can consume excess CPU.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.816 (99.6th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.816 · newest: 0.816 · change: 0.000
Affected products
- Apache Traffic Server
- Apple Mac OS X
- Apple Swiftnio
- F5 nginx
- Mcafee Web Gateway
- Node.js
- Oracle Enterprise Communications Broker — versions 3.1.0, 3.2.0
- Oracle Graalvm — versions 19.2.0
- Synology Diskstation Manager — versions 6.2
- Synology Skynas
Weakness classification (CWE)
Public proof-of-concept exploits
References
- kb.cert.org/vuls/id/605641/ (US Government Resource, Third Party Advisory, third-party-advisory)
- usn.ubuntu.com/4099-1/ (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- seclists.org/bugtraq/2019/Aug/40 (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2019/dsa-4505 (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)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- seclists.org/bugtraq/2019/Sep/1 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9513?
- CVE-2019-9513 is a high-severity vulnerability in Apache Traffic Server, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2019-08-13.
- How severe is CVE-2019-9513?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-9513 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.