Openswan 2.2.x does not properly restrict permissions for (1) /var/run/starter.pid, related to starter.c in the IPsec starter, and (2) /var/lock/subsys/ipsec, which allows local users to kill arbitrary processes by writing a PID to a file, or possibly bypass disk quotas by writing arbitrary data to a file, as demonstrated by files with 0666 permissions, a different vulnerability than CVE-2011-1784.

linux-patch-openswan 2.4.12 allows local users to overwrite arbitrary files via a symlink attack on (a) /tmp/snap##### and (b) /tmp/nightly##### temporary files, related to the (1) maysnap and (2) maytest scripts.

The IPSEC livetest tool in Openswan 2.4.12 and earlier, and 2.6.x through 2.6.16, allows local users to overwrite arbitrary files and execute arbitrary code via a symlink attack on the (1) ipseclive.conn and (2) ipsec.olts.remote.log temporary files. NOTE: in many distributions and the upstream version, this tool has been disabled.

The Internet Key Exchange version 1 (IKEv1) implementation in Openswan 2 (openswan-2) before 2.4.4, and freeswan in SUSE LINUX 9.1 before 2.04_1.5.4-1.23, allow remote attackers to cause a denial of service via (1) a crafted packet using 3DES with an invalid key length, or (2) unspecified inputs when Aggressive Mode is enabled and the PSK is known, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

Stack-based buffer overflow in the get_internal_addresses function in the pluto application for Openswan 1.x before 1.0.9, and Openswan 2.x before 2.3.0, when compiled with XAUTH and PAM enabled, allows remote authenticated attackers to execute arbitrary code.

FreeS/WAN 1.x and 2.x, and other related products including superfreeswan 1.x, openswan 1.x before 1.0.6, openswan 2.x before 2.1.4, and strongSwan before 2.1.3, allows remote attackers to authenticate using spoofed PKCS#7 certificates in which a self-signed certificate identifies an alternate Certificate Authority (CA) and spoofed issuer and subject.