CVE-2021-39241
First published: Tue Aug 17 2021(Updated: )
An issue was discovered in HAProxy 2.0 before 2.0.24, 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. An HTTP method name may contain a space followed by the name of a protected resource. It is possible that a server would interpret this as a request for that protected resource, such as in the "GET /admin? HTTP/1.1 /static/images HTTP/1.1" example.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Haproxy Haproxy | >=2.0.0<2.0.24 | |
| Haproxy Haproxy | >=2.2.0<2.2.16 | |
| Haproxy Haproxy | >=2.3.0<2.3.13 | |
| Haproxy Haproxy | >=2.4.0<2.4.3 | |
| Debian Debian Linux | =11.0 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| debian/haproxy | 1.8.19-1+deb10u3 1.8.19-1+deb10u4 2.2.9-2+deb11u5 2.6.12-1 2.6.15-1 |
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Reference Links
- https://www.mail-archive.com/haproxy@formilux.org/msg41041.html
- https://git.haproxy.org/?p=haproxy.git;a=commit;h=89265224d314a056d77d974284802c1b8a0dc97f
- https://security-tracker.debian.org/tracker/CVE-2021-39241
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/
- https://www.debian.org/security/2021/dsa-4960
Frequently Asked Questions
What is the severity of CVE-2021-39241?
The severity of CVE-2021-39241 is medium with a CVSS score of 5.3.
How does CVE-2021-39241 affect HAProxy?
CVE-2021-39241 affects HAProxy versions 2.0 before 2.0.24, 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3.
What is the impact of CVE-2021-39241?
An attacker can send a specially crafted request that may allow them to access protected resources.
How can I fix CVE-2021-39241?
Update HAProxy to version 2.0.24, 2.2.16, 2.3.13, or 2.4.3 to fix CVE-2021-39241.
Where can I find more information about CVE-2021-39241?
You can find more information about CVE-2021-39241 at the following references: [Reference 1](https://git.haproxy.org/?p=haproxy.git;a=commit;h=89265224d314a056d77d974284802c1b8a0dc97f), [Reference 2](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/), [Reference 3](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/)
- collector/security-tracker-debian
- collector/nvd-index
- agent/severity
- agent/author
- agent/references
- agent/description
- agent/type
- agent/tags
- agent/event
- package-manager/debian
- vendor/haproxy
- canonical/haproxy haproxy
- version/haproxy haproxy/2.0.0
- version/haproxy haproxy/2.2.0
- version/haproxy haproxy/2.3.0
- version/haproxy haproxy/2.4.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/11.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34