Infinite Loop Vulnerability in Unbound 1.18.0-1.19.1
CVE-2024-1931
Key Information:
- Vendor
Nlnet Labs
- Status
- Vendor
- CVE Published:
- 7 March 2024
Badges
What is CVE-2024-1931?
NLnet Labs' Unbound versions 1.18.0 through 1.19.1 exhibit a vulnerability that can trigger a denial of service due to an infinite loop in an unverified code path. The issue arises from a feature implemented in version 1.18.0, which interacts with the handling of Extended DNS Error (EDE) records. When the 'ede: yes' option is configured, the software attempts to trim EDE records' textual information for proper response sizing. However, due to an unchecked condition during this trimming process, an infinite loop may occur if the client's advertised buffer size is smaller than what is necessary to include those records. The vulnerability remains a concern until it is addressed in version 1.19.2, which has implemented corrective measures to prevent this looping behavior.
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Affected Version(s)
Unbound 1.18.0 < 1.19.2
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.
References
EPSS Score
6% chance of being exploited in the next 30 days.
CVSS V3.1
Timeline
- 🟡
Public PoC available
- 👾
Exploit known to exist
Vulnerability published
Vulnerability Reserved