CVE-2021-26691

CWE-122 — Heap-based Buffer OverflowCWE-787 — Out-of-bounds WriteCWE-119 — Buffer OverflowCWE-918 — Server-Side Request Forgery (SSRF)12 documents9 sources
Severity
9.8CRITICAL
EPSS
40.4%
top 2.65%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
8
Oracle Secure BackupApache Http ServerApache Software Foundation Apache Http Server+5 more
Timeline
PublishedJun 10
Latest updateMay 24

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages7 packages

▶NVDapache/http_server2.4.0 — 2.4.46
▶Debianapache2< 2.4.46-6+3
▶NVDoracle/instantis_enterprisetrack17.1, 17.2, 17.3+2
▶NVDoracle/secure_backup< 18.1.0.1.0

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

Patches

Patch: www.oracle.com ↗Patch: www.oracle.com ↗Patch: www.oracle.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-j3ww-p97m-gh9x: In Apache HTTP Server versions 2↗2022-05-24
▶
CVEList
Apache HTTP Server mod_session response handling heap overflow↗2021-06-10
▶
OSV
CVE-2021-26691: In Apache HTTP Server versions 2↗2021-06-10
▶

📋Vendor Advisories

8
Oracle
Oracle Oracle Secure Backup Risk Matrix: Oracle Secure Backup (Apache HTTP Server) — CVE-2021-26691↗2022-01-15
▶
Red Hat
httpd: Regression of CVE-2021-40438 and CVE-2021-26691 fixes in Red Hat Enterprise Linux 8.5↗2021-11-09
▶
Oracle
Oracle Oracle Construction and Engineering Risk Matrix: Core (Apache HTTP Server) — CVE-2021-26691↗2021-10-15
▶
Ubuntu
Apache HTTP Server vulnerabilities↗2021-06-21
▶
Ubuntu
Apache HTTP Server vulnerabilities↗2021-06-21
▶