Stack-based buffer overflow in Apache Traffic Server - CVE-2021-35474
Published: June 30, 2021
Vulnerability identifier: #VU54464
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-35474
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the cachekey plugin. A remote unauthenticated attacker can send specially crafted traffic to the application, trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Apache Traffic Server
trafficserver (Debian package)
trafficserver (Debian package)
How to mitigate CVE-2021-35474
Install updates from vendor's website.
Apache Traffic Server - addressed in versions 8.1.2, 9.0.2
trafficserver (Debian package) - update to 8.0.2+ds-1+deb10u5
trafficserver (Debian package) - update to 8.0.2+ds-1+deb10u5