CVE-2021-39240
First published: Tue Aug 17 2021(Updated: )
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 does not ensure that the scheme and path portions of a URI have the expected characters. For example, the authority field (as observed on a target HTTP/2 server) might differ from what the routing rules were intended to achieve.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 | |
| 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 |
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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=4b8852c70d8c4b7e225e24eb58258a15eb54c26e
- https://git.haproxy.org/?p=haproxy.git;a=commit;h=a495e0d94876c9d39763db319f609351907a31e8
- https://security-tracker.debian.org/tracker/CVE-2021-39240
- 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 vulnerability ID for this issue in HAProxy?
The vulnerability ID is CVE-2021-39240.
What are the affected versions of HAProxy?
HAProxy versions 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3 are affected.
What is the severity level of CVE-2021-39240?
The severity level of CVE-2021-39240 is high with a CVSS score of 7.5.
How does CVE-2021-39240 impact HAProxy?
CVE-2021-39240 allows an attacker to bypass routing rules and affect the scheme and path portions of a URI in HAProxy.
Is there a fix available for CVE-2021-39240?
Yes, fix versions are available. Please update to HAProxy version 2.2.16, 2.3.13, or 2.4.3 or later.
- collector/security-tracker-debian
- collector/nvd-index
- agent/references
- agent/severity
- agent/author
- agent/description
- agent/tags
- agent/type
- agent/event
- agent/remedy
- package-manager/debian
- vendor/haproxy
- canonical/haproxy haproxy
- 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