References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

Change History

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.

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CWE-191

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

[{"vendor":"Nmap","product":"Nmap","defaultStatus":"affected","versions":[{"version":"0","lessThanOrEqual":"7.99","versionType":"custom","status":"affected"}]}]