PT-2020-3635 · Apache · Apache Traffic Server

Bryan Call · Published 2020-06-24 · Updated 2022-03-31 · CVE-2020-9494

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Apache Traffic Server versions 6.0.0 through 6.2.3 Apache Traffic Server versions 7.0.0 through 7.1.10 Apache Traffic Server versions 8.0.0 through 8.0.7

Description The issue is related to a buffer data boundary overflow in the Apache Traffic Server, which can be exploited by a remote attacker to cause a denial of service. The vulnerability can be triggered by certain types of HTTP/2 HEADERS frames, leading to excessive memory allocation and thread spinning.

Recommendations For Apache Traffic Server versions 6.0.0 through 6.2.3, update to a version outside of this range to resolve the issue. For Apache Traffic Server versions 7.0.0 through 7.1.10, update to a version outside of this range to resolve the issue. For Apache Traffic Server versions 8.0.0 through 8.0.7, update to a version outside of this range to resolve the issue. As a temporary workaround, consider restricting the handling of HTTP/2 HEADERS frames to minimize the risk of exploitation.

Fix

Buffer Overflow

Allocation of Resources Without Limits

Weakness Enumeration

CWE-119

CWE-770

Related Identifiers

BDU:2020-03982

CVE-2020-9494

DLA-2594-1

DSA-4710-1

USN-5360-1

Affected Products

Apache Traffic Server

References · 31

• https://lists.apache.org/thread.html/rf7f86917f42fdaf904d99560cba0c016e03baea6244c47efeb60ecbe%40%3Cdev.trafficserver.apache.org%3E · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-9494 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-25329 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-33037 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-9494 · Security Note
• https://debian.org/security/2020/dsa-4710 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4710-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-9484 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-9494 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-9494 · Security Note
• https://ubuntu.com/security/CVE-2020-9494 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-17527 · Vendor Advisory
• https://osv.dev/vulnerability/USN-5360-1 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2594-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-25122 · Vendor Advisory