#VU45957 Resource exhaustion in Squid - CVE-2020-24606
Published: August 23, 2020 / Updated: August 25, 2020
Vulnerability identifier: #VU45957
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:U/U:Clear
CVE-ID: CVE-2020-24606
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Squid
Squid
Software vendor:
Squid-cache.org
Squid-cache.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly EOF in peerDigestHandleReply() function in peer_digest.cc when processing Cache Digest response messages from a trusted peer. A remote attacker who controls a trusted peer can consume all available CPU cycles and perform a denial of service (DoS) attack.
This attack is limited to Squid using cache_peer with cache digests feature.
Remediation
Install updates from vendor's website.