Description (CNA)
Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Nmap / Nmap | affected 0 through 7.99 |
CWE
CWE-191
References
- https://github.com/bikini/exploitarium/tree/main/nmap-ipv6-extlen-wrap-poc
- https://github.com/nmap/nmap/commit/bb6754e76bb1686315008e1aa1c40202a513fb83
- https://nmap.org/changelog.html
- https://www.vulncheck.com/advisories/nmap-integer-underflow-in-ipv6-extension-header-parsing
ADP enrichment
No English description supplied.
No references supplied.