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HistoryOct 08, 2021 - 8:56 p.m.

[SECURITY] [DSA 4982-1] apache2 security update

2021-10-0820:56:04
lists.debian.org
91
apache2
denial of service
mod_proxy
security update
cve-2021-34798
cve-2021-36160
cve-2021-39275
cve-2021-40438
debian
stable distribution

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.9

Confidence

High

EPSS

0.967

Percentile

99.7%


Debian Security Advisory DSA-4982-1 [email protected]
https://www.debian.org/security/ Moritz Muehlenhoff
October 08, 2021 https://www.debian.org/security/faq


Package : apache2
CVE ID : CVE-2021-34798 CVE-2021-36160 CVE-2021-39275 CVE-2021-40438

Several vulnerabilities have been found in the Apache HTTP server, which
could result in denial of service. In addition a vulnerability was
discovered in mod_proxy with which an attacker could trick the server
to forward requests to arbitrary origin servers.

For the oldstable distribution (buster), these problems have been fixed
in version 2.4.38-3+deb10u6.

For the stable distribution (bullseye), these problems have been fixed in
version 2.4.51-1~deb11u1.

We recommend that you upgrade your apache2 packages.

For the detailed security status of apache2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/apache2

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.9

Confidence

High

EPSS

0.967

Percentile

99.7%