Vulnerability · Published Jul 14, 2020 · Assigned by apache
CVE-2020-13935
High 7.5
In plain English
A high-severity security flaw in Apache Tomcat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 86.6% (higher than 99.7% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)86.6%top 0.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | tomcat9 | 9.0.37-1 | DEBIAN-CVE-2020-13935 |
| Debian:13 | tomcat9 | 9.0.37-1 | DEBIAN-CVE-2020-13935 |
| Debian:14 | tomcat9 | 9.0.37-1 | DEBIAN-CVE-2020-13935 |
| Maven | org.apache.tomcat.embed:tomcat-embed-websocket | 9.0.37 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat.embed:tomcat-embed-websocket | 10.0.0-M7 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat.embed:tomcat-embed-websocket | 7.0.105 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat.embed:tomcat-embed-websocket | 8.5.57 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat:tomcat | 10.0.0-M7 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat:tomcat | 7.0.105 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat:tomcat | 8.5.57 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat:tomcat | 9.0.37 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat:tomcat-websocket | 7.0.105 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat:tomcat-websocket | 10.0.0-M7 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat:tomcat-websocket | 9.0.37 | GHSA-m7jv-hq7h-mq7c |
| Maven | org.apache.tomcat:tomcat-websocket | 8.5.57 | GHSA-m7jv-hq7h-mq7c |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Apache Tomcat | Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56, 7.0.27 to 7.0.104 |
References
- https://lists.apache.org/thread.html/rd48c72bd3255bda87564d4da3791517c074d94f8a701f93b85752651%40%3Cannounce.tomcat.apache.org%3E x_refsource_MISC
- DSA-4727 vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20200722 [SECURITY] [DLA 2286-1] tomcat8 security update mailing-list, x_refsource_MLIST
- openSUSE-SU-2020:1102 vendor-advisory, x_refsource_SUSE
- openSUSE-SU-2020:1111 vendor-advisory, x_refsource_SUSE
- USN-4448-1 vendor-advisory, x_refsource_UBUNTU
- https://www.oracle.com/security-alerts/cpuoct2020.html x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200724-0003/ x_refsource_CONFIRM
- https://kc.mcafee.com/corporate/index?page=content&id=SB10332 x_refsource_CONFIRM
- USN-4596-1 vendor-advisory, x_refsource_UBUNTU
- [tomcat-users] 20201118 Re: Strange crash-on-takeoff, Tomcat 7.0.104 mailing-list, x_refsource_MLIST
- https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuApr2021.html x_refsource_MISC
- https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuoct2021.html x_refsource_MISC
- https://www.oracle.com/security-alerts/cpujan2022.html x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC