CVE-2024-1931
Unbound Infinite EDE Record Trimming Loop
Description
NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite loop. Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client's advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client's buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the 'ede: yes' option is used; non default configuration. From version 1.19.2 on, the code is fixed to avoid looping indefinitely.
INFO
Published Date :
March 7, 2024, 10:15 a.m.
Last Modified :
Dec. 17, 2024, 4:56 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2024-1931 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-1931.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE-2024-1931-reproduction
Dockerfile Shell
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The following list is the news that have been mention
CVE-2024-1931 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-1931 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Dec. 17, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE NIST CWE-835 Added CPE Configuration OR *cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:* versions from (including) 1.18.0 up to (excluding) 1.19.2 Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:* Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/ Product Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/ Product Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/ Product Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/ Product Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/ Product Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/ Product Changed Reference Type https://lists.freebsd.org/archives/freebsd-security/2024-July/000283.html No Types Assigned https://lists.freebsd.org/archives/freebsd-security/2024-July/000283.html Issue Tracking, Mailing List Changed Reference Type https://lists.freebsd.org/archives/freebsd-security/2024-July/000283.html No Types Assigned https://lists.freebsd.org/archives/freebsd-security/2024-July/000283.html Issue Tracking, Mailing List Changed Reference Type https://security.netapp.com/advisory/ntap-20240705-0006/ No Types Assigned https://security.netapp.com/advisory/ntap-20240705-0006/ Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20240705-0006/ No Types Assigned https://security.netapp.com/advisory/ntap-20240705-0006/ Third Party Advisory Changed Reference Type https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt No Types Assigned https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt Vendor Advisory Changed Reference Type https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt No Types Assigned https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt Vendor Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/ Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/ Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/ Added Reference https://lists.freebsd.org/archives/freebsd-security/2024-July/000283.html Added Reference https://security.netapp.com/advisory/ntap-20240705-0006/ Added Reference https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt -
CVE Modified by [email protected]
Jul. 05, 2024
Action Type Old Value New Value Added Reference NLnet Labs https://security.netapp.com/advisory/ntap-20240705-0006/ [No types assigned] -
CVE Modified by [email protected]
Jul. 03, 2024
Action Type Old Value New Value Added Reference NLnet Labs https://lists.freebsd.org/archives/freebsd-security/2024-July/000283.html [No types assigned] -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 28, 2024
Action Type Old Value New Value Added Reference NLnet Labs https://lists.fedoraproject.org/archives/list/[email protected]/message/B2JUIFPA7H75Q2W3VXW2TUNHK6NVGOX4/ [No types assigned] Added Reference NLnet Labs https://lists.fedoraproject.org/archives/list/[email protected]/message/RBR4H7RCVMJ6H76S4LLRSY5EBFTYWGXK/ [No types assigned] -
CVE Modified by [email protected]
Apr. 19, 2024
Action Type Old Value New Value Added Reference NLnet Labs https://lists.fedoraproject.org/archives/list/[email protected]/message/4VCBRQ7KMSIGBQ6A4SBL5PF326DIJIIV/ [No types assigned] -
CVE Received by [email protected]
Mar. 07, 2024
Action Type Old Value New Value Added Description NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite loop. Unbound 1.18.0 introduced a feature that removes EDE records from responses with size higher than the client's advertised buffer size. Before removing all the EDE records however, it would try to see if trimming the extra text fields on those records would result in an acceptable size while still retaining the EDE codes. Due to an unchecked condition, the code that trims the text of the EDE records could loop indefinitely. This happens when Unbound would reply with attached EDE information on a positive reply and the client's buffer size is smaller than the needed space to include EDE records. The vulnerability can only be triggered when the 'ede: yes' option is used; non default configuration. From version 1.19.2 on, the code is fixed to avoid looping indefinitely. Added Reference NLnet Labs https://www.nlnetlabs.nl/downloads/unbound/CVE-2024-1931.txt [No types assigned] Added CWE NLnet Labs CWE-835 Added CVSS V3.1 NLnet Labs AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-1931 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-1931
weaknesses.