Detections
Analytics
Amazon Linux 2 : bind (ALAS-2023-2001)
medium Nessus Plugin ID 173204
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Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of bind installed on the remote host is prior to 9.11.4-26.P2. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2001 advisory.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. It is possible to gradually erode available memory to the point where named crashes for lack of resources. (CVE-2022-38178)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'yum update bind' to update your system.See Also
https://alas.aws.amazon.com/AL2/ALAS-2023-2001.html
https://alas.aws.amazon.com/cve/html/CVE-2021-25220.html
https://alas.aws.amazon.com/cve/html/CVE-2022-2795.html
https://alas.aws.amazon.com/cve/html/CVE-2022-38177.html
Plugin Details
Severity: Medium
ID: 173204
File Name: al2_ALAS-2023-2001.nasl
Version: 1.2
Type: local
Agent: unix
Published: 3/22/2023
Updated: 12/11/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 4
Temporal Score: 3
Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N
CVSS Score Source: CVE-2021-25220
CVSS v3
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.9
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.3
Threat Score: 1.7
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2022-2795
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:bind-pkcs11-utils, p-cpe:/a:amazon:linux:bind-pkcs11-devel, p-cpe:/a:amazon:linux:bind-export-libs, p-cpe:/a:amazon:linux:bind-libs-lite, p-cpe:/a:amazon:linux:bind-lite-devel, p-cpe:/a:amazon:linux:bind-export-devel, p-cpe:/a:amazon:linux:bind-sdb-chroot, p-cpe:/a:amazon:linux:bind-debuginfo, p-cpe:/a:amazon:linux:bind-chroot, p-cpe:/a:amazon:linux:bind-devel, p-cpe:/a:amazon:linux:bind-pkcs11-libs, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:bind-sdb, p-cpe:/a:amazon:linux:bind-license, p-cpe:/a:amazon:linux:bind-utils, p-cpe:/a:amazon:linux:bind-libs, p-cpe:/a:amazon:linux:bind, p-cpe:/a:amazon:linux:bind-pkcs11
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 3/17/2023
Vulnerability Publication Date: 3/16/2022
Reference Information
CVE: CVE-2021-25220, CVE-2022-2795, CVE-2022-38177, CVE-2022-38178
IAVA: 2022-A-0122-S, 2022-A-0387-S