CVE-2021-40346
Published: 7 September 2021
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
haproxy Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| hirsute |
Released
(2.2.9-1ubuntu0.2)
|
|
| trusty |
Does not exist
|
|
| xenial |
Not vulnerable
(code not present)
|
|
| impish |
Released
(2.2.9-2ubuntu2)
|
|
| upstream |
Needs triage
|
|
| focal |
Released
(2.0.13-2ubuntu0.3)
|
|
| jammy |
Released
(2.2.9-2ubuntu2)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |