Audit Linux privileges now to limit compromise, escalation, and system-wide damage. Review Linux Privileges×

Alerts This Week
Warning Icon 1 468
Alerts This Week
Warning Icon 1 468

Gentoo: GLSA-202012-22 Normal: HAProxy Arbitrary Code Execution Risk

gentoo
Calendar Grey December 24, 2020
Scroller Gentoo
An overflow vulnerability in HAProxy has the potential to let malicious users run unauthorized code or trigger a Denial of Service attack. Update your software immediately!
A buffer overflow in HAProxy might allow an attacker to execute arbitrary code.

Summary

It was discovered that HAProxy incorrectly handled certain HTTP/2 headers.

Topics%20covered

Topics Covered

security advisory denial of service Gentoo update gentoo buffer overflow code execution normal severity HAProxy

Resolution

All HAProxy 2.0.x users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-proxy/haproxy-2.0.13:0/2.0"
All other HAProxy users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-proxy/haproxy-2.1.4"

References

[ 1 ] CVE-2020-11100 https://nvd.nist.gov/vuln/detail/CVE-2020-11100

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202012-22
style>.gentoo_availability{display:block;}

Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: HAProxy: Arbitrary code execution
Date: December 24, 2020
Bugs: #715944
ID: 202012-22

Topics%20covered

Topics Covered

security advisory denial of service Gentoo update gentoo buffer overflow code execution normal severity HAProxy

Synopsis

A buffer overflow in HAProxy might allow an attacker to execute arbitrary code.

Background

HAProxy is a TCP/HTTP reverse proxy for high availability environments.

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-proxy/haproxy < 2.1.4 >= 2.0.13:0/2.0 >= 2.1.4

Impact

===== A remote attacker, by sending a specially crafted HTTP/2 request, could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition.

Workaround

Disable HTTP/2 support.