Input validation error in Squid - CVE-2020-8449

Vulnerability identifier: #VU25017

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-8449

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied input when processing HTTP requests. A remote attacker can send a specially crafted HTTP request, bypass configured security filters and gain access to certain server resources.

Squid
Amazon Linux AMI
Gentoo Linux
Anolis OS
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Opensuse
openEuler
Fedora
squid (Debian package)
squid (Alpine package)
squid3 (Ubuntu package)
squid (Ubuntu package)
libecap
libecap-devel
squid-sysvinit
squid-migration-script
squid
squid (Red Hat package)
squid-debugsource
squid-debuginfo

Install updates from vendor's website.

Squid - update to 4.10
squid (Debian package) - update to 4.6-1+deb10u2
squid (Alpine package) - update to 3.5.27-r4
squid3 (Ubuntu package) - addressed in versions 3.5.12-1ubuntu7.10, 3.5.27-1ubuntu1.5
squid (Ubuntu package) - update to 4.8-1ubuntu2.2
libecap - update to 1.0.1-2
libecap-devel - update to 1.0.1-2
squid-sysvinit - update to 3.5.20-17
squid-migration-script - update to 3.5.20-17
squid - addressed in versions 3.5.20-17, 4.11-4
squid (Red Hat package) - update to 3.5.20-17.el7_9.4
squid-debugsource - update to 4.9-2
squid-debuginfo - update to 4.9-2
squid - update to 4.9-2
squid - addressed in versions 4.10-3.fc30, 4.10-3.fc31

• http://www.squid-cache.org/Advisories/SQUID-2020_1.txt
• http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2020_1.patch
• http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-8e657e835965c3a011375feaa0359921c5b3e2dd.patch
• http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_1.patch
• http://www.squid-cache.org/Versions/v4/changesets/squid-4-b3a0719affab099c684f1cd62b79ab02816fa962.patch
• http://www.squid-cache.org/Versions/v4/changesets/squid-4-d8e4715992d0e530871519549add5519cbac0598.patch

• Multiple vulnerabilities in Squid Proxy Cache
• Ubuntu update for Squid
• OpenSUSE Linux update for squid
• Gentoo update for Squid
• OpenSUSE Linux update for squid
• Debian update for squid
• Input validation error in squid (Alpine package)
• Red Hat Enterprise Linux 7 update for squid
• Red Hat Enterprise Linux 8 update for the squid:4 module
• Amazon Linux AMI update for squid
• openEuler 20.03 LTS update for squid
• Anolis OS update for squid:4 (Anolis OS 8.4) module
• Anolis OS update for squid
• Fedora 31 update for squid
• Fedora 30 update for squid