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.

The version of tomcat7 installed on the remote host is prior to 7.0.108-1.40. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2021-1493 advisory.

  - When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to     7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the     server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is     configured with sessionAttributeValueClassNameFilter=null (the default unless a SecurityManager is used)     or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker     knows the relative file path from the storage location used by FileStore to the file the attacker has     control over; then, using a specifically crafted request, the attacker will be able to trigger remote code     execution via deserialization of the file under their control. Note that all of conditions a) to d) must     be true for the attack to succeed. (CVE-2020-9484)

  - 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. (CVE-2020-9494)

  - The fix for CVE-2020-9484 was incomplete. When using Apache Tomcat 10.0.0-M1 to 10.0.0, 9.0.0.M1 to     9.0.41, 8.5.0 to 8.5.61 or 7.0.0. to 7.0.107 with a configuration edge case that was highly unlikely to be     used, the Tomcat instance was still vulnerable to CVE-2020-9494. Note that both the previously published     prerequisites for CVE-2020-9484 and the previously published mitigations for CVE-2020-9484 also apply to     this issue. (CVE-2021-25329)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Bryan Call reports :

ATS 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.

A vulnerability was discovered in Apache Traffic Server, a reverse and forward proxy server, which could result in denial of service via malformed HTTP/2 headers.

ID	Name	Product	Family	Severity
148378	Amazon Linux AMI : tomcat7 (ALAS-2021-1493)	Nessus	Amazon Linux Local Security Checks	high
139435	FreeBSD : trafficserver -- resource consumption (6fd773d3-bc5a-11ea-b38d-f0def1d0c3ea)	Nessus	FreeBSD Local Security Checks	high
137864	Debian DSA-4710-1 : trafficserver - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2020-9494

high

Tenable Plugins

high

high

high