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CVE-2021-26691

Status Candidate

Overview

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

Related Files

Red Hat Security Advisory 2021-3816-01
Posted Oct 13, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-3816-01 - The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server. Issues addressed include heap overflow and server-side request forgery vulnerabilities.

tags | advisory, web, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2021-26691, CVE-2021-40438
MD5 | 7cf611150f0bfbb476f7b62096ee1e48
Gentoo Linux Security Advisory 202107-38
Posted Jul 17, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202107-38 - Multiple vulnerabilities have been found in Apache, the worst of which could result in a Denial of Service condition. Versions less than 2.4.48 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2019-17567, CVE-2020-13950, CVE-2020-35452, CVE-2021-26690, CVE-2021-26691, CVE-2021-30641, CVE-2021-31618
MD5 | 23480b56ad39430303023d136903921b
Ubuntu Security Notice USN-4994-2
Posted Jun 22, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4994-2 - USN-4994-1 fixed several vulnerabilities in Apache. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Antonio Morales discovered that the Apache mod_auth_digest module incorrectly handled certain Digest nonces. A remote attacker could possibly use this issue to cause Apache to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-35452, CVE-2021-26690, CVE-2021-26691, CVE-2021-30641
MD5 | 660fa56849544234d133450e4f7d0b84
Ubuntu Security Notice USN-4994-1
Posted Jun 21, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4994-1 - Marc Stern discovered that the Apache mod_proxy_http module incorrectly handled certain requests. A remote attacker could possibly use this issue to cause Apache to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. Antonio Morales discovered that the Apache mod_auth_digest module incorrectly handled certain Digest nonces. A remote attacker could possibly use this issue to cause Apache to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-13950, CVE-2020-35452, CVE-2021-26690, CVE-2021-26691, CVE-2021-30641
MD5 | 5541c6df78d894101aa9435f63731c3c
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