PT-2020-13869 · Squid+5 · Squid+6

Christof Gerber + 1 · Published 2020-06-30 · Updated 2022-04-28 · CVE-2020-14058

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Squid versions prior to 4.12 Squid versions 5.x prior to 5.0.3

Description An issue was discovered in Squid due to the use of a potentially dangerous function. Squid and the default certificate validation helper are vulnerable to a Denial of Service when opening a TLS connection to an attacker-controlled server for HTTPS. This occurs because unrecognized error values are mapped to NULL, but later code expects that each error value is mapped to a valid error string.

Recommendations For Squid versions prior to 4.12, update to version 4.12 or later. For Squid versions 5.x prior to 5.0.3, update to version 5.0.3 or later.

Fix

Related Identifiers

ALSA-2020:4743

ALT-PU-2020-3116

ALT-PU-2020-3140

ALT-PU-2020-3142

CESA-2020_4743

CVE-2020-14058

MGASA-2020-0332

OESA-2021-1092

RHSA-2020:4743

RHSA-2020_4743

RLSA-2020:4743

Affected Products

Alt Linux

Almalinux

Centos

Red Hat

Rocky Linux

Squid

Squid Cache

References · 62

• https://nvd.nist.gov/vuln/detail/CVE-2020-15810 · Security Note
• http://squid-cache.org/Versions/v4/changesets/squid-4-93f5fda134a2a010b84ffedbe833d670e63ba4be.patch · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2020-0332 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-14058 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3RG5FGSTCAYVIJPJHIY3MRZ7NFT6HDO7 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-14058 · Vendor Advisory
• http://squid-cache.org/Advisories/SQUID-2020_6.txt · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2020:4743 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-14058 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-15811 · Security Note
• https://osv.dev/vulnerability/RLSA-2020:4743 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-14058 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-15049 · Security Note
• https://linux.oracle.com/errata/ELSA-2020-4743.html · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1092 · Vendor Advisory