[IT-SecNots] [SECURITY] [DSA 4309-1] strongswan security update

[Yves-Alexis Perez <corsac AT debian.org>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4309-1                   security AT debian.org
https://www.debian.org/security/                        Yves-Alexis Perez
October 01, 2018                      https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : strongswan
CVE ID         : CVE-2018-17540

Google's OSS-Fuzz revealed an exploitable bug in the gmp plugin caused by the
patch that fixes CVE-2018-16151 and CVE-2018-16151 (DSA-4305-1).

An attacker could trigger it using crafted certificates with RSA keys with
very small moduli. Verifying signatures with such keys would cause an integer
underflow and subsequent heap buffer overflow resulting in a crash of the
daemon. While arbitrary code execution is not completely ruled out because of
the heap buffer overflow, due to the form of the data written to the buffer
it seems difficult to actually exploit it in such a way.

For the stable distribution (stretch), this problem has been fixed in
version 5.5.1-4+deb9u4.

We recommend that you upgrade your strongswan packages.

For the detailed security status of strongswan please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/strongswan

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce AT lists.debian.org
-----BEGIN PGP SIGNATURE-----

iQEzBAEBCgAdFiEE8vi34Qgfo83x35gF3rYcyPpXRFsFAluzH80ACgkQ3rYcyPpX
RFvI5wf8DILbxELj4t7YjgZyT0pKzqSm2fDVO/Xjl6hj0Fnf6XidEvNx764NFoCo
x6MBILJohIAbzZo/3sT41vAuKKMfiasuUY0KSz4hHgRlwLqiNBOOTuKrR1PhrtmS
BKJg9PRfi0a+dwb2J0+UkKcaZQYMItqEBCjsZkF46lBFSx+dgs6spbSy3MmiY0ve
szxg/JyRLS6WLE87R8AUrBskPwcYu3jhjg53E02VnpKB+UXXb6NWC9D2zlpWRilx
9RQPofwjWNYoM7pM1QITPuUeFR5ia+7X7BA9SL7McMV6BWGimVCDEMZshTpqRTME
dOx9vpXrO5JZwMFk2hkxhFoA6ewo2g==
=L68k
-----END PGP SIGNATURE-----