vulnerability
Ubuntu: (CVE-2021-39242): haproxy vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:P/A:N) | Aug 17, 2021 | Nov 19, 2024 | Mar 27, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
Aug 17, 2021
Added
Nov 19, 2024
Modified
Mar 27, 2026
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.
Solution
ubuntu-upgrade-haproxy
References
- CVE-2021-39242
- https://attackerkb.com/topics/CVE-2021-39242
- CWE-755
- DEBIAN-DSA-4960
- EUVD-EUVD-2021-25604
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-25604
- https://ubuntu.com/security/notices/USN-5042-1
- https://www.cve.org/CVERecord?id=CVE-2021-39242
- https://www.mail-archive.com/[email protected]/msg41041.html
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