Inconsistent interpretation of HTTP requests in Squid - CVE-2020-25097

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Main Vulnerability Database Vulnerabilities #VU51248

Inconsistent interpretation of HTTP requests in Squid - CVE-2020-25097

Published: March 8, 2021


Vulnerability identifier: #VU51248
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-25097
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.


Affected software

Squid
Gentoo Linux
SUSE CaaS Platform
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Enterprise Storage
Anolis OS
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
CentOS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_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 ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
SUSE OpenStack Cloud Crowbar
SUSE OpenStack Cloud
SUSE Linux Enterprise Point of Sale
SUSE Linux Enterprise Debuginfo
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Server Applications
Ubuntu
openEuler
Fedora
squid (Debian package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
libecap-devel
libecap
squid3-debugsource
squid3-debuginfo
squid3
squid (Ubuntu package)
squid-sysvinit
squid-migration-script
squid
squid (Red Hat package)
squid-debuginfo
squid-debugsource

How to mitigate CVE-2020-25097

Install updates from vendor's website.

Squid - addressed in versions 4.14, 5.0.5
squid (Debian package) - update to 4.6-1+deb10u5
libecap-devel - update to 1.0.1-2
libecap - update to 1.0.1-2
squid3-debugsource - update to 3.1.23-8.16.37.18.1
squid3-debuginfo - update to 3.1.23-8.16.37.18.1
squid3 - update to 3.1.23-8.16.37.18.1
squid (Ubuntu package) - addressed in versions 3.5.12-1ubuntu7.16, 3.5.27-1ubuntu1.10, 4.10-1ubuntu1.3, 4.13-1ubuntu2.1
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, 4.4-8, 4.11-4
squid (Red Hat package) - update to 3.5.20-17.el7_9.6
squid - addressed in versions 3.5.21-26.35.1, 4.15-4.18.1, 4.15-5.26.1
squid-debuginfo - addressed in versions 3.5.21-26.35.1, 4.15-4.18.1, 4.15-5.26.1
squid-debugsource - addressed in versions 3.5.21-26.35.1, 4.15-4.18.1, 4.15-5.26.1
squid - update to 4.9-7
squid-debuginfo - update to 4.9-7
squid-debugsource - update to 4.9-7
squid - addressed in versions 4.14-1.fc32, 4.14-1.fc33, 4.14-1.fc34

External References

Related Security Bulletins