CVE-2021-40346 - Debian Debian Linux and Haproxy Haproxy
Critical 7.5
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 software
Debian Debian Linux
Haproxy Haproxy
Reference links
- https://git.haproxy.org/?p=haproxy.git
- https://www.debian.org/security/2021/dsa-4968
- https://www.mail-archive.com/haproxy@formilux.org
- https://www.mail-archive.com/haproxy@formilux.org/msg41114.html
- https://jfrog.com/blog/critical-vulnerability-in-haproxy-cve-2021-40346-integer-overflow-enables-http-smuggling/
- https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95
- https://lists.apache.org/thread.html/r284567dd7523f5823e2ce995f787ccd37b1cc4108779c50a97c79120@%3Cdev.cloudstack.apache.org%3E
- https://lists.apache.org/thread.html/r8a58fd7a29808e5d27ee56877745e58dc4bb041b9af94601554e2a5a@%3Cdev.cloudstack.apache.org%3E