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ALSA-2021:4257 — Moderate: httpd:2.4 security, bug fix, and enhancement update

Affected: AlmaLinux:8: mod_http2, AlmaLinux:8: mod_md

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

* httpd: mod_session: NULL pointer dereference when parsing Cookie header (CVE-2021-26690)

* httpd: Unexpected URL matching with 'MergeSlashes OFF' (CVE-2021-30641)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

bdu:2021-03680

Withdrawn: BELL-CVE-2021-30641 — CVE-2021-30641 does not affect BellSoft software

Withdrawn by the publisher.

BIT-apache-2021-30641 — Unexpected URL matching with 'MergeSlashes OFF'

Affected: Bitnami: apache

Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'

certfr-2021-avi-897 — De multiples vulnérabilités ont été découvertes dans Zimbra. Elles permettent à un attaquant de provoquer un contournem…

certfr-2021-avi-897

EUVD-2026-27016

fkie_cve-2021-30641

Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'

GHSA-jfgv-4796-2jw7

Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'

gsd-2021-30641

msrc_CVE-2021-30641 — Unexpected URL matching with 'MergeSlashes OFF'

msrc_CVE-2021-30641

OESA-2021-1246 — httpd security update

Affected: openEuler:20.03-LTS-SP1: httpd

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server. Security Fix(es): 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(CVE-2021-26691) Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service(CVE-2020-13950) Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team could create one, though some particular compiler and/or compilation option might make it possible, with limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow(CVE-2020-35452)

Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with MergeSlashes OFF(CVE-2021-30641)

openSUSE-SU-2021:0908-1 — Security update for apache2

Security update for apache2

RHSA-2021:4613 — Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP10 security update

httpd: mod_proxy_wstunnel tunneling of non Upgraded connection pcre: Buffer over-read in JIT when UTF is disabled and \X or \R has fixed quantifier greater than 1 httpd: mod_proxy NULL pointer dereference pcre: Integer overflow when parsing callout numeric arguments httpd: Single zero byte stack overflow in mod_auth_digest JBCS: URL normalization issue with dot-dot-semicolon(s) leads to information disclosure openssl: Read buffer overruns processing ASN.1 strings openssl: integer overflow in CipherUpdate openssl: NULL pointer dereference in X509_issuer_and_serial_hash() httpd: mod_session: NULL pointer dereference when parsing Cookie header httpd: mod_session: Heap overflow via a crafted SessionHeader value httpd: Unexpected URL matching with 'MergeSlashes OFF' httpd: NULL pointer dereference via malformed requests

SUSE-SU-2021:14749-1 — Security update for apache2

Security update for apache2

UBUNTU-CVE-2021-30641

Affected: Ubuntu:Pro:14.04:LTS: apache2, Ubuntu:Pro:16.04:LTS: apache2, Ubuntu:18.04:LTS: apache2, Ubuntu:20.04:LTS: apache2

Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'

WID-SEC-W-2022-0438 — Apache HTTP Server: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Apache HTTP Server ausnutzen, um einen Denial of Service Angriff durchzuführen, Sicherheitsvorkehrungen zu umgehen oder sonstige Auswirkungen zu verursachen.