Description
The racoon daemon in IPsec-Tools 0.8.2 contains a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments. The implementation permits a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order such that the worst-case computational complexity is realized in the algorithm utilized to determine if reassembly of the fragments can take place.
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 7 | ipsec-tools | 1:0.8.0-14+deb7u2 | DLA-1044-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | ipsec-tools | 1:0.8.2+20140711-10 | — |
| Ubuntu 16.04 LTS | ipsec-tools | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | ipsec-tools | 0.8.0-19.3.1 | SUSE-SU-2018:0424-1 |
| SLES 12 SP2 | ipsec-tools | 0.8.0-19.3.1 | SUSE-SU-2018:0424-1 |
| SLES 11 SP4 | ipsec-tools | 0.7.3-1.38.3.1 | SUSE-SU-2018:0423-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | ipsec-tools | 0.8.0-19.3.1 | SUSE-SU-2018:0424-1 |
| SLES for SAP 12 SP2 | ipsec-tools | 0.8.0-19.3.1 | SUSE-SU-2018:0424-1 |
| SLES for SAP 11 SP4 | ipsec-tools | 0.7.3-1.38.3.1 | SUSE-SU-2018:0423-1 |
Advisories 3
- DLA-1044-1 ipsec-tools - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:0423-1 Security update for ipsec-tools SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0424-1 Security update for ipsec-tools SUSE / openSUSE Security Updates · May 2, 2025