Buffer overflow in Apache Tomcat
CVE-2016-6817
The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.
Vulnerability class: Buffer Overflow
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: 0.072 (94.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.072 · newest: 0.072 · change: 0.000
Affected products
- Apache Tomcat — versions 8.5.0, 8.5.1, 8.5.2
- Apache Software Foundation Tomcat — versions 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1037330 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.apache.org/thread.html/a9f24571460af003071475b75f18cad81ebcc36fa7c876965a… (mailing-list)
- security.netapp.com/advisory/ntap-20180607-0001/
- www.securityfocus.com/bid/94462 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.apache.org/thread.html/343558d982879bf88ec20dbf707f8c11255f8e219e81d45c4f… (mailing-list)
- lists.apache.org/thread.html/b5e3f51d28cd5d9b1809f56594f2cf63dcd6a90429e16ea9f8… (mailing-list)
- lists.apache.org/thread.html/88855876c33f2f9c532ffb75bfee570ccf0b17ffa77493745a… (mailing-list)
- lists.apache.org/thread.html/6af47120905aa7d8fe12f42e8ff2284fb338ba141d3b77b8c7… (mailing-list)
Frequently asked questions
- What is CVE-2016-6817?
- CVE-2016-6817 is a high-severity vulnerability in Apache Tomcat, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-08-10.
- How severe is CVE-2016-6817?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-6817 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.