CVE-2024-19317.5HighCWE-835

CVE-2024-1931: Denial of service when trimming EDE text on positive replies

NLnet Labs · Unbound

Vendor fix available · Affected: NLnet Labs Unbound · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

2.5%probability of exploitation in the next 30 days

85th percentile

050100

Higher than 85% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

NLnet Labs · Unboundfrom 1.18.0 before 1.19.2

On the Atlas

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Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Loop with Unreachable Exit Condition · Denial of Service
Vendor: NLnet Labs
Published: March 2024
Band: Possible (1 to 10%), March 2024

CoverageNo articles yet

No CyberSIXT article names CVE-2024-1931 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.