PT-2021-3628 · Apache · Apache Traffic Server

Masaori Koshiba · Published 2021-06-30 · Updated 2021-09-20 · CVE-2021-32567

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Apache Traffic Server versions 7.0.0 through 7.1.12 Apache Traffic Server versions 8.0.0 through 8.1.1 Apache Traffic Server versions 9.0.0 through 9.0.1

Description The issue is related to improper input validation in the HTTP/2 module of Apache Traffic Server, which can be exploited by an attacker to cause a denial of service (DOS) of the server.

Recommendations For versions 7.0.0 through 7.1.12, update to a version outside of this range to resolve the issue. For versions 8.0.0 through 8.1.1, update to a version outside of this range to resolve the issue. For versions 9.0.0 through 9.0.1, update to a version outside of this range to resolve the issue. As a temporary workaround, consider restricting access to the HTTP/2 module until a patch is available.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2021-03824

CVE-2021-32567

DSA-4957-1

Affected Products

Apache Traffic Server

References · 23

• https://nvd.nist.gov/vuln/detail/CVE-2021-32567#vulnCurrentDescriptionTitle · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-32567 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-32567 · Security Note
• https://bdu.fstec.ru/vul/2021-03824 · Security Note
• https://osv.dev/vulnerability/DSA-4957-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-32567 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-32567 · Vendor Advisory
• https://lists.apache.org/thread.html/ra1a41ff92a70d25bf576d7da2590575e8ff430393a3f4a0c34de4277%40%3Cusers.trafficserver.apache.org%3E · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-32567 · Security Note
• https://ubuntu.com/security/CVE-2021-32567 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-32567 · Vendor Advisory
• https://debian.org/security/2021/dsa-4957 · Vendor Advisory
• https://github.com/apache/trafficserver/commit/b82a3d192f995fb9d78e1c44d51d9acca4783277 · Note
• https://github.com/apache/trafficserver/pull/7945 · Note
• https://github.com/apache/trafficserver/commit/034965e0fd0def114658f0048d953d1c16a95bed · Note