CVE-2020-9494

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-24 · updated 2026-06-17
Weakness: CWE-770

Description

Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.10, and 8.0.0 to 8.0.7 is vulnerable to certain types of HTTP/2 HEADERS frames that can cause the server to allocate a large amount of memory and spin the thread.

Affected products

Apache Software Foundation Apache Traffic Server: from 6.0.0 through 6.2.3; from 7.0.0 through 7.1.10; from 8.0.0 through 8.0.7
Debian Linux: 10.0

References

http://www.openwall.com/lists/oss-security/2021/03/01/2
https://lists.apache.org/thread.html/rf7f86917f42fdaf904d99560cba0c016e03baea6244c47efeb60ecbe%40%3Cdev.trafficserver.apache.org%3E
https://www.debian.org/security/2020/dsa-4710
http://www.openwall.com/lists/oss-security/2021/03/01/2
https://lists.apache.org/thread.html/rf7f86917f42fdaf904d99560cba0c016e03baea6244c47efeb60ecbe%40%3Cdev.trafficserver.apache.org%3E
https://www.debian.org/security/2020/dsa-4710

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