HTTP: HAProxy HTTP Header Handling Integer Overflow
This signature detects attempts to exploit a known vulnerability against HAProxy. A successful attack can lead to a buffer overflow and arbitrary remote code execution within the context of the server.
Extended Description
An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.
Affected Products
Fedoraproject fedora
Short Name
HTTP:CTS:HAPRXY-HDER-INT-OVRFLW
Severity
Major
Recommended
False
Recommended Action
Drop
Category
HTTP
Keywords
CVE-2021-40346 HAProxy HTTP Handling Header Integer Overflow
Release Date
09/23/2021
Supported Platforms
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vsrx-19.2
srx-19.3
srx-branch-12.3
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx-12.3
vmx-19.3
srx-12.3
Sigpack Version
3590
False Positive
Unknown
Vendors
Haproxy
Fedoraproject
Debian
CVSS Score
5.0