CVE-2021-26690

CWE-476 — NULL Pointer Dereference11 documents8 sources
Severity
7.5HIGH
EPSS
70.4%
top 1.31%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
7
Apache Http ServerApache Software Foundation Apache Http ServerDebian Debian Linux+4 more
Timeline
PublishedJun 10
Latest updateMay 24

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages6 packages

▶NVDapache/http_server2.4.0 — 2.4.46
▶Debianapache2< 2.4.46-6+3
▶NVDoracle/instantis_enterprisetrack17.1, 17.2, 17.3+2

Also affects: Debian Linux 10.0, 9.0, Fedora 34, 35

🔴Vulnerability Details

5
GHSA
GHSA-f669-j28w-pjvg: Apache HTTP Server versions 2↗2022-05-24
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OSV
apache2 vulnerabilities↗2021-06-21
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OSV
apache2 vulnerabilities↗2021-06-21
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OSV
CVE-2021-26690: Apache HTTP Server versions 2↗2021-06-10
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CVEList
mod_session NULL pointer dereference↗2021-06-10
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📋Vendor Advisories

5
Ubuntu
Apache HTTP Server vulnerabilities↗2021-06-21
▶
Ubuntu
Apache HTTP Server vulnerabilities↗2021-06-21
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Microsoft
mod_session NULL pointer dereference↗2021-06-08
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Red Hat
httpd: mod_session: NULL pointer dereference when parsing Cookie header↗2021-06-04
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Debian
CVE-2021-26690: apache2 - Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header ha...↗2021
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