CVE-2021-26691
Apache HTTP Server mod_session response handling heap overflow
CRITICAL 9.8EPSS 68.3%
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
- Affected
- Apache Software Foundation · Apache HTTP Server
- CVSS v3.1 NVD
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P - EPSS
- 68.29% chance of exploitation in the next 30 days, 99th percentile
- Published
- 2021-06-10
- Updated
- 2024-08-03
Proof-of-concept exploits (1)
- fkm75P8YjLkb/CVE-2021-266910★ · 2021-07-15
Security advisories
- http://httpd.apache.org/security/vulnerabilities_24.html
- https://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8…
- http://www.openwall.com/lists/oss-security/2021/06/10/7
- https://lists.debian.org/debian-lts-announce/2021/07/msg00006.html
- https://security.gentoo.org/glsa/202107-38
- https://security.netapp.com/advisory/ntap-20210702-0001
- https://www.debian.org/security/2021/dsa-4937
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html