Description
Multiple memory leaks in Ipsec-tools before 0.7.2 allow remote attackers to cause a denial of service (memory consumption) via vectors involving (1) signature verification during user authentication with X.509 certificates, related to the eay_check_x509sign function in src/racoon/crypto_openssl.c; and (2) the NAT-Traversal (aka NAT-T) keepalive implementation, related to src/racoon/nattraversal.c.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | ipsec-tools | 1:0.7.1-1.3+lenny2 | DSA-1804-1 |
| Debian 4.0 | ipsec-tools | 1:0.6.6-3.1etch3 | DSA-1804-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | ipsec-tools | 0.6.5-13.el5_3.1 | RHSA-2009:1036 |
Advisories 2
- RHSA-2009:1036 Red Hat Security Advisory: ipsec-tools security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1804-1 ipsec-tools - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-785-1 vendor-advisory
- http://sourceforge.net/project/shownotes.php?group_id=74601&release_id=677611
- 35159 third-party-advisory
- [oss-security] 20090429 ipsec-tools 0.7.2 mailing-list
- MDVSA-2009:114 vendor-advisory
- http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/crypto_openssl.c
- oval:org.mitre.oval:def:10581 vdb-entry signature
- 34765 vdb-entry
- RHSA-2009:1036 vendor-advisory
- 35404 third-party-advisory
- 35212 third-party-advisory
- GLSA-200905-03 vendor-advisory
- 35685 third-party-advisory
- [oss-security] 20090512 Re: ipsec-tools 0.7.2 mailing-list
- https://trac.ipsec-tools.net/ticket/303
- SUSE-SR:2009:012 vendor-advisory
- ADV-2009-3184 vdb-entry
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
- http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/nattraversal.c
- 35153 third-party-advisory
- APPLE-SA-2009-11-09-1 vendor-advisory
- [ipsec-tools-announce] 20090422 Ipsec-tools 0.7.2 released mailing-list
- http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/nattraversal.c.diff?r1=1.6&r2=1.6.6.1&f=h
- http://cvsweb.netbsd.org/bsdweb.cgi/src/crypto/dist/ipsec-tools/src/racoon/crypto_openssl.c.diff?r1=1.11.6.4&r2=1.11.6.5&f=h
- DSA-1804 vendor-advisory
- http://support.apple.com/kb/HT3937