Exposed dangerous method or function in Squid - CVE-2020-14058

Vulnerability identifier: #VU29390

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-14058

CWE-ID: CWE-749

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to usage of potentially dangerous function when processing TLS certificates. A remote client can perform a denial of service attack when opening TLS connections.

Squid
Amazon Linux AMI
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Anolis OS
openEuler
Fedora
libecap
libecap-devel
squid
squid-debugsource
squid-debuginfo

Install updates from vendor's website.

Squid - addressed in versions 4.12, 5.0.3
libecap - update to 1.0.1-2
libecap-devel - update to 1.0.1-2
squid - update to 3.5.20-17.45
squid - update to 4.9-5
squid-debugsource - update to 4.9-5
squid-debuginfo - update to 4.9-5
squid - update to 4.11-4
squid - update to 4.12-1.fc31

• https://github.com/squid-cache/squid/security/advisories/GHSA-qvf6-485q-vm57

• Multiple vulnerabilities in Squid
• Red Hat Enterprise Linux 8 update for the squid:4 module
• Amazon Linux AMI update for squid
• openEuler update for squid
• Anolis OS update for squid:4 (Anolis OS 8.4) module
• Fedora 31 update for squid