QID 354835

Date Published: 2023-03-23

QID 354835: Amazon Linux Security Advisory for bind : ALAS2-2023-2001

A cache poisoning vulnerability was found in bind when using forwarders.
Bogus ns records supplied by the forwarders may be cached and used by name if it needs to recurse for any reason.
This issue causes it to obtain and pass on potentially incorrect answers.
This flaw allows a remote attacker to manipulate cache results with incorrect records, leading to queries made to the wrong servers, possibly resulting in false information received on the client's end. (
( CVE-2021-25220) 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) 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.
( CVE-2022-38178)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2-2023-2001 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 354835

    CVE-2022-2795 | CVE-2021-25220 | CVE-2022-38177 | CVE-2022-38178 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2-2023-2001 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALAS-2023-2001.html
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