GLSA-200705-09 : IPsec-Tools: Denial of Service
Medium Nessus Plugin ID 25186
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200705-09 (IPsec-Tools: Denial of Service)
The isakmp_info_recv() function in src/racoon/isakmp_inf.c does not always check that DELETE (ISAKMP_NPTYPE_D) and NOTIFY (ISAKMP_NPTYPE_N) packets are encrypted.
A remote attacker could send a specially crafted IPsec message to one of the two peers during the beginning of phase 1, resulting in the termination of the IPsec exchange.
There is no known workaround at this time.
SolutionAll IPsec-Tools users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-firewall/ipsec-tools-0.6.7'