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Test ID:1.3.6.1.4.1.25623.1.0.844982
Category:Ubuntu Local Security Checks
Title:Ubuntu: Security Advisory for apache2 (USN-4994-1)
Summary:The remote host is missing an update for the 'apache2'; package(s) announced via the USN-4994-1 advisory.
Description:Summary:
The remote host is missing an update for the 'apache2'
package(s) announced via the USN-4994-1 advisory.

Vulnerability Insight:
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. (CVE-2020-13950)

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.
(CVE-2020-35452)

Antonio Morales discovered that the Apache mod_session module incorrectly
handled certain Cookie headers. A remote attacker could possibly use this
issue to cause Apache to crash, resulting in a denial of service.
(CVE-2021-26690)

Christophe Jaillet discovered that the Apache mod_session module
incorrectly handled certain SessionHeader values. A remote attacker could
use this issue to cause Apache to crash, resulting in a denial of service,
or possibly execute arbitrary code. (CVE-2021-26691)

Christoph Anton Mitterer discovered that the new MergeSlashes configuration
option resulted in unexpected behaviour in certain situations.
(CVE-2021-30641)

Affected Software/OS:
'apache2' package(s) on Ubuntu 20.10, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS.

Solution:
Please install the updated package(s).

CVSS Score:
7.5

CVSS Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-13950
Common Vulnerability Exposure (CVE) ID: CVE-2020-35452
Common Vulnerability Exposure (CVE) ID: CVE-2021-26690
Common Vulnerability Exposure (CVE) ID: CVE-2021-26691
Common Vulnerability Exposure (CVE) ID: CVE-2021-30641
CopyrightCopyright (C) 2021 Greenbone Networks GmbH

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