openswan - implementation error

The information security group at ETH Zurich discovered a denial of
service vulnerability in the crypto helper handler of the IKE daemon
pluto. More information can be found in the
upstream advisory.

For the oldstable distribution (lenny), this problem has been fixed in
version 1:2.4.12+dfsg-1.3+lenny4.

For the stable distribution (squeeze), this problem has been fixed in
version 1:2.6.28+dfsg-5+squeeze1.

For the unstable distribution (sid), this problem has been fixed in
version 1:2.6.37-1.

We recommend that you upgrade your openswan packages.