CVE-2020-13935
high
CVSS v3
—
CVSS v4 NEW
—
VIR risk
8.0
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.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 9.0.37-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 9.0.37-1 |
| sid | Fixed | 9.0.37-1 |
| forky | Fixed | 9.0.37-1 |
| bullseye | Fixed | 9.0.37-1 |
| bookworm | Fixed | 9.0.37-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.tomcat:tomcat | >=10.0.0-M1,<10.0.0-M7 | 10.0.0-M7 |
| Maven | org.apache.tomcat:tomcat | >=9.0.0.M1,<9.0.37 | 9.0.37 |
| Maven | org.apache.tomcat:tomcat | >=8.5.0,<8.5.57 | 8.5.57 |
| Maven | org.apache.tomcat:tomcat | >=7.0.27,<7.0.105 | 7.0.105 |
References
- https://www.suse.com/security/cve/CVE-2020-13935.html
- https://nvd.nist.gov/vuln/detail/CVE-2020-13935
- https://github.com/apache/tomcat/commit/12d715676038efbf9c728af10163f8277fc019d5
- https://github.com/apache/tomcat/commit/1c1c77b0efb667cea80b532440b44cea1dc427c3
- https://github.com/apache/tomcat/commit/40fa74c74822711ab878079d0a69f7357926723d
- https://github.com/apache/tomcat/commit/4c04982870d6e730c38e21e58fb653b7cf723784
- https://github.com/apache/tomcat/commit/f9f75c14678b68633f79030ddf4ff827f014cc84
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.debian.org/security/2020/dsa-4727
- https://usn.ubuntu.com/4596-1
- https://usn.ubuntu.com/4448-1
- https://tomcat.apache.org/security-9.html
- https://tomcat.apache.org/security-8.html
- https://tomcat.apache.org/security-7.html
- https://tomcat.apache.org/security-10.html
- https://security.netapp.com/advisory/ntap-20200724-0003
- https://lists.debian.org/debian-lts-announce/2020/07/msg00017.html
- https://lists.apache.org/thread.html/rd48c72bd3255bda87564d4da3791517c074d94f8a701f93b85752651%40%3Cannounce.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r4e5d3c09f4dd2923191e972408b40fb8b42dbff0bc7904d44b651e50@%3Cusers.tomcat.apache.org%3E
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.