PT-2020-3645 · Apache · Apache Traffic Server

Masaori Koshiba · Published 2020-04-27 · Updated 2020-08-18 · CVE-2020-9481

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 ATS versions 6.0.0 through 6.2.3 Apache ATS versions 7.0.0 through 7.1.9 Apache ATS versions 8.0.0 through 8.0.6

Description The issue is related to a HTTP/2 slow read attack and a reverse proxy and proxy redirection vulnerability in the Apache Traffic Server, which can lead to uncontrolled resource consumption. Exploitation of this issue may allow a remote attacker to cause a denial of service.

Recommendations For versions 6.0.0 through 6.2.3, update to a version outside of this range to resolve the issue. For versions 7.0.0 through 7.1.9, update to a version outside of this range to resolve the issue. For versions 8.0.0 through 8.0.6, update to a version outside of this range to resolve the issue. As a temporary workaround, consider restricting access to the HTTP/2 protocol until a patch is available.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2020-03993

CVE-2020-9481

DSA-4672-1

Affected Products

Apache Traffic Server

References · 13

• https://cve.org/CVERecord?id=CVE-2020-9481 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-9481 · Vendor Advisory
• https://lists.apache.org/thread.html/r21ddaf0a4a973f3c43c7ff399ae50d2f858f13f87bd6a9551c5cf6db%40%3Cannounce.trafficserver.apache.org%3E · Patch
• https://bdu.fstec.ru/vul/2020-03993 · Security Note
• https://debian.org/security/2020/dsa-4672 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-9481 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-9481 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4672-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-9481 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-9481 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-9481 · Vendor Advisory
• https://lists.apache.org/thread.html/rcb8bae0b289d71d18a3220be256c1dfcc4d9ab49d2d6e07d1eac7c9d%40%3Cannounce.trafficserver.apache.org%3E · Note
• https://t.me/cvenotify/3295 · Telegram Post