Out-of-bounds write in Squid - CVE-2019-12519

Vulnerability identifier: #VU27665

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-12519

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when handling the tag esi:when within ESIExpression::Evaluate. A remote attacker can pass specially crafted data to the application, trigger out-of-bounds write and execute arbitrary code on the target system.

Squid
Amazon Linux AMI
Gentoo Linux
Anolis OS
CentOS
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Opensuse
openEuler
squid (Debian package)
squid (Alpine package)
squid (Red Hat package)
squid3 (Ubuntu package)
squid (Ubuntu package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
squid
squid-migration-script
squid-sysvinit
squid-debuginfo
squid-debugsource

Install updates from vendor's website.

Squid - update to 4.11
squid (Debian package) - update to 4.6-1+deb10u2
squid (Red Hat package) - update to 3.5.20-15.el7_8.1
squid3 (Ubuntu package) - addressed in versions 3.5.12-1ubuntu7.11, 3.5.27-1ubuntu1.6
squid (Ubuntu package) - addressed in versions 4.8-1ubuntu2.3, 4.10-1ubuntu1.1
squid - update to 3.5.20-17
squid-migration-script - update to 3.5.20-17
squid-sysvinit - update to 3.5.20-17
squid - update to 4.9-3
squid-debuginfo - update to 4.9-3
squid-debugsource - update to 4.9-3

• http://www.openwall.com/lists/oss-security/2020/04/23/1
• https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12519.txt
• https://www.debian.org/security/2020/dsa-4682
• http://www.squid-cache.org/Advisories/SQUID-2019_12.txt

• Multiple vulnerabilities in Squid Proxy Cache
• Red Hat Enterprise Linux 8 update for the squid:4 module
• Red Hat Enterprise Linux 7 update for squid
• Red Hat Enterprise Linux 8 update for the squid:4 module
• Red Hat Enterprise Linux 8 update for the squid:4 module
• Debian update for squid
• OpenSUSE Linux update for squid
• Gentoo update for Squid
• Ubuntu update for Squid
• CentOS 7 update for squid
• Amazon Linux AMI update for squid
• Amazon Linux AMI update for squid
• Out-of-bounds write in squid (Alpine package)
• openEuler update for squid
• Anolis OS update for squid