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HistorySep 22, 2022 - 1:30 p.m.

[SECURITY] [DSA 5235-1] bind9 security update

2022-09-2213:30:54
lists.debian.org
21

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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


Debian Security Advisory DSA-5235-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
September 22, 2022 https://www.debian.org/security/faq


Package : bind9
CVE ID : CVE-2022-2795 CVE-2022-3080 CVE-2022-38177 CVE-2022-38178

Several vulnerabilities were discovered in BIND, a DNS server
implementation.

CVE-2022-2795

Yehuda Afek, Anat Bremler-Barr and Shani Stajnrod discovered that a
flaw in the resolver code can cause named to spend excessive amounts
of time on processing large delegations, significantly degrade
resolver performance and result in denial of service.

CVE-2022-3080

Maksym Odinintsev discovered that the resolver can crash when stale
cache and stale answers are enabled with a zero
stale-answer-timeout. A remote attacker can take advantage of this
flaw to cause a denial of service (daemon crash) via specially
crafted queries to the resolver.

CVE-2022-38177

It was discovered that the DNSSEC verification code for the ECDSA
algorithm is susceptible to a memory leak flaw. A remote attacker
can take advantage of this flaw to cause BIND to consume resources,
resulting in a denial of service.

CVE-2022-38178

It was discovered that the DNSSEC verification code for the EdDSA
algorithm is susceptible to a memory leak flaw. A remote attacker
can take advantage of this flaw to cause BIND to consume resources,
resulting in a denial of service.

For the stable distribution (bullseye), these problems have been fixed in
version 1:9.16.33-1~deb11u1.

We recommend that you upgrade your bind9 packages.

For the detailed security status of bind9 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/bind9

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]

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

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