An attacker can leverage this flaw to gradually erode available memory to the point where named crashes for lack of resources. Upon restart the attacker would have to begin again, but nevertheless there is the potential to deny service.

The remote host is affected by the vulnerability described in GLSA-202210-25 (ISC BIND: Multiple Vulnerabilities)

  - In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 ->     9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND     9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing     can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it     possible for its internal data structures to grow almost infinitely, which may cause significant delays in     client query processing. (CVE-2021-25219)

  - BIND 9.11.0 -> 9.11.36 9.12.0 -> 9.16.26 9.17.0 -> 9.18.0 BIND Supported Preview Editions: 9.11.4-S1 ->     9.11.36-S1 9.16.8-S1 -> 9.16.26-S1 Versions of BIND 9 earlier than those shown - back to 9.1.0, including     Supported Preview Editions - are also believed to be affected but have not been tested as they are EOL.
    The cache could become poisoned with incorrect records leading to queries being made to the wrong servers,     which might also result in false information being returned to clients. (CVE-2021-25220)

  - BIND 9.16.11 -> 9.16.26, 9.17.0 -> 9.18.0 and versions 9.16.11-S1 -> 9.16.26-S1 of the BIND Supported     Preview Edition. Specifically crafted TCP streams can cause connections to BIND to remain in CLOSE_WAIT     status for an indefinite period of time, even after the client has terminated the connection.
    (CVE-2022-0396)

  - By flooding the target resolver with queries exploiting this flaw an attacker can significantly impair the     resolver's performance, effectively denying legitimate clients access to the DNS resolution service.
    (CVE-2022-2795)

  - The underlying bug might cause read past end of the buffer and either read memory it should not read, or     crash the process. (CVE-2022-2881)

  - An attacker can leverage this flaw to gradually erode available memory to the point where named crashes     for lack of resources. Upon restart the attacker would have to begin again, but nevertheless there is the     potential to deny service. (CVE-2022-2906)

  - By sending specific queries to the resolver, an attacker can cause named to crash. (CVE-2022-3080)

  - By spoofing the target resolver with responses that have a malformed ECDSA signature, an attacker can     trigger a small memory leak. It is possible to gradually erode available memory to the point where named     crashes for lack of resources. (CVE-2022-38177)

  - By spoofing the target resolver with responses that have a malformed EdDSA signature, an attacker can     trigger a small memory leak. It is possible to gradually erode available memory to the point where named     crashes for lack of resources. (CVE-2022-38178)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of ISC BIND installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the cve-2022-2906 advisory.

  - An attacker can leverage this flaw to gradually erode available memory to the point where named crashes     for lack of resources. Upon restart the attacker would have to begin again, but nevertheless there is the     potential to deny service. (CVE-2022-2906)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5626-1 advisory.

    Yehuda Afek, Anat Bremler-Barr, and Shani Stajnrod discovered that Bind incorrectly handled large     delegations. A remote attacker could possibly use this issue to reduce performance, leading to a denial of     service. (CVE-2022-2795)

    It was discovered that Bind incorrectly handled statistics requests. A remote attacker could possibly use     this issue to obtain sensitive memory contents, or cause a denial of service. This issue only affected     Ubuntu 22.04 LTS. (CVE-2022-2881)

    It was discovered that Bind incorrectly handled memory when processing certain Diffie-Hellman key     exchanges. A remote attacker could use this issue to consume resources, leading to a denial of service.
    This issue only affected Ubuntu 22.04 LTS. (CVE-2022-2906)

    Maksym Odinintsev discovered that Bind incorrectly handled answers from cache when configured with a zero     stale-answer-timeout. A remote attacker could possibly use this issue to cause Bind to crash, resulting in     a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-3080)

    It was discovered that Bind incorrectly handled memory when processing ECDSA DNSSEC verification. A remote     attacker could use this issue to consume resources, leading to a denial of service. This issue only     affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2022-38177)

    It was discovered that Bind incorrectly handled memory when processing EDDSA DNSSEC verification. A remote     attacker could use this issue to consume resources, leading to a denial of service. (CVE-2022-38178)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
166720	GLSA-202210-25 : ISC BIND: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high
165302	ISC BIND 9.18.0 < 9.18.7 / 9.19.0 < 9.19.5 Memory Exhaustion (cve-2022-2906)	Nessus	DNS	high
165290	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Bind vulnerabilities (USN-5626-1)	Nessus	Ubuntu Local Security Checks	medium

Detections

Analytics

CVE-2022-2906

high

Tenable Plugins

high

high

medium