CyberRota Analysis
AI-GeneratedUnbound versions up to and including 1.26.0 are vulnerable to a heap buffer overflow due to inadequate buffer length checks during the RRSet canonicalization process, specifically when handling a 255-character query name with a large TCP response. This vulnerability can be exploited by an attacker controlling a malicious name server or manipulating DNS responses, potentially leading to remote code execution. Organizations using Unbound should prioritize patching this vulnerability to mitigate the risk of exploitation.
Original NVD Description
In NLnet Labs Unbound up to and including 1.26.0, a 255 length query name with a large TCP response can lead to a heap buffer overflow during the RRSet canonicalisation routine. This is caused by missing to add the first owner name into the buffer length check. A malicious actor operating a malicious name server or tampering with an incoming response to Unbound (canonicalisation happens before DNSSEC validation), can trigger the vulnerability.
Related CVEs
Other vulnerabilities affecting the same vendor(s)