Description (CNA)
OpenWrt Project is a Linux operating system targeting embedded devices. In versions prior to 24.10.6 and 25.12.1, the mdns daemon has a Stack-based Buffer Overflow vulnerability in the match_ipv6_addresses function, triggered when processing PTR queries for IPv6 reverse DNS domains (.ip6.arpa) received via multicast DNS on UDP port 5353. During processing, the domain name from name_buffer is copied via strcpy into a fixed 256-byte stack buffer, and then the reverse IPv6 request is extracted into a buffer of only 46 bytes (INET6_ADDRSTRLEN). Because the length of the data is never validated before this extraction, an attacker can supply input larger than 46 bytes, causing an out-of-bounds write. This allows a specially crafted DNS query to overflow the stack buffer in match_ipv6_addresses, potentially enabling remote code execution. This issue has been fixed in versions 24.10.6 and 25.12.1.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| openwrt / openwrt | affected >= 25.12.0-rc1, < 25.12.1; affected < 24.10.6 |
CWE
CWE-121
References
- https://github.com/openwrt/openwrt/security/advisories/GHSA-mpgh-v658-jqv5
- https://github.com/openwrt/openwrt/releases/tag/v24.10.6
- https://github.com/openwrt/openwrt/releases/tag/v25.12.1
ADP enrichment
No English description supplied.
No references supplied.