SB2020120802 - Proxy cache poisonong in Apache Traffic Server
Published: December 8, 2020
Security Bulletin ID
SB2020120802
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2020-17509)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform cache poisoning attacks.
The vulnerability exists due to insufficient validation of user-supplied input in Apache Traffic Server when negative cache option is enabled. A remote attacker can send specially crafted data to the proxy server and poison negative server's cache.
Remediation
Install update from vendor's website.