CVE-2021-39242
High
Description
An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Haproxy
PublishedAug 17, 2021
First seenAug 17, 2021
How to fix
Update
- haproxy haproxy2.2.16, 2.3.13, 2.4.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| haproxy haproxy | 2.2.0 ≤ v < 2.2.16, 2.3.0 ≤ v < 2.3.13, 2.4.0 ≤ v < 2.4.3 | 2.2.16, 2.3.13, 2.4.3 |
| debian debian_linux | 11.0 | — |
| fedoraproject fedora | 33, 34 | — |
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