CVE-2021-40346
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Haproxy
PublishedSep 8, 2021
First seenSep 8, 2021
How to fix
Update
- haproxy haproxy2.0.25, 2.2.17, 2.3.14, 2.4.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| haproxy haproxy | 2.0.0 ≤ v < 2.0.25, 2.2.0 ≤ v < 2.2.17, 2.3.0 ≤ v < 2.3.14, 2.4.0 ≤ v < 2.4.4, 2.5 | 2.0.25, 2.2.17, 2.3.14, 2.4.4 |
| debian debian_linux | 11.0 | — |
| fedoraproject fedora | 33, 34 | — |
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