vulnerability
Apache HTTPD: mod_session response handling heap overflow (CVE-2021-26691)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:L/Au:N/C:P/I:P/A:P) | Jun 10, 2021 | Dec 22, 2021 | Jul 2, 2025 |
Severity
7
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
Published
Jun 10, 2021
Added
Dec 22, 2021
Modified
Jul 2, 2025
Description
In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow
Solution
apache-httpd-upgrade-latest
References
- URL-http://httpd.apache.org/security/vulnerabilities_24.html
- URL-http://www.openwall.com/lists/oss-security/2021/06/10/7
- URL-https://lists.apache.org/thread.html/r50cae1b71f1e7421069036b213c26da7d8f47dd59874e3bd956959fe%40%3Cannounce.httpd.apache.org%3E
- URL-https://lists.apache.org/thread.html/r7f2b70b621651548f4b6f027552f1dd91705d7111bb5d15cda0a68dd%40%3Cdev.httpd.apache.org%3E
- URL-https://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3E
- URL-https://lists.debian.org/debian-lts-announce/2021/07/msg00006.html
- URL-https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/
- URL-https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/
- URL-https://security.gentoo.org/glsa/202107-38
- URL-https://security.netapp.com/advisory/ntap-20210702-0001/
- URL-https://www.debian.org/security/2021/dsa-4937
- URL-https://www.oracle.com/security-alerts/cpujan2022.html
- URL-https://www.oracle.com/security-alerts/cpuoct2021.html
- CVE-2021-26691
- https://attackerkb.com/topics/CVE-2021-26691
- CWE-122
- CWE-787
NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.