CVE-2021-26690

HIGH

Apache HTTP Server < 2.4.46 - NULL Pointer Dereference

Title source: rule

Description

Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service

Exploits (3)

nomisec WRITEUP 1 stars

by 7own · poc

https://github.com/7own/CVE-2021-26690---Apache-mod_session

View Code ZIP pw:eip

nomisec NO CODE

by danielduan2002 · poc

https://github.com/danielduan2002/CVE-2021-26690

View Code ZIP pw:eip

nomisec

by dja2TaqkGEEfA45 · poc

https://github.com/dja2TaqkGEEfA45/CVE-2021-26690

View on nomisec

References (12)

[Release Notes, Vendor Advisory] http://httpd.apache.org/security/vulnerabilities_24.html

[Mailing List, Third Party Advisory] http://www.openwall.com/lists/oss-security/2021/06/10/6

[Mailing List] https://lists.apache.org/thread.html/r7f2b70b621651548f4b6f027552f1dd91705d7111bb5d15cda0a68dd%40%3Cdev.httpd.apache.org%3E

[Mailing List] https://lists.apache.org/thread.html/rae406c1d19c0dfd3103c96923dadac2af1cd0bad6905ab1ede153865%40%3Cannounce.httpd.apache.org%3E

[Mailing List, Vendor Advisory] https://lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3E

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/07/msg00006.html

[Third Party Advisory] https://security.gentoo.org/glsa/202107-38

[Third Party Advisory] https://security.netapp.com/advisory/ntap-20210702-0001/

[Mailing List, Third Party Advisory] https://www.debian.org/security/2021/dsa-4937

[Third Party Advisory] https://www.oracle.com/security-alerts/cpuoct2021.html

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/

Scores

CVSS v3 7.5

EPSS 0.7038

EPSS Percentile 98.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-476

Status published

Products (10)

apache/http_server 2.4.0 - 2.4.46

debian/debian_linux 9.0

debian/debian_linux 10.0

fedoraproject/fedora 34

fedoraproject/fedora 35

oracle/enterprise_manager_ops_center 12.4.0.0

oracle/instantis_enterprisetrack 17.1

oracle/instantis_enterprisetrack 17.2

oracle/instantis_enterprisetrack 17.3

oracle/zfs_storage_appliance_kit 8.8

Published Jun 10, 2021

Tracked Since Feb 18, 2026