-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - ------------------------------------------------------------------------- Debian Security Advisory DSA-2664-1 security@xxxxxxxxxx http://www.debian.org/security/ Salvatore Bonaccorso May 2, 2013 http://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : stunnel4 Vulnerability : buffer overflow Problem type : remote Debian-specific: no CVE ID : CVE-2013-1762 Debian Bug : 702267 Stunnel, a program designed to work as an universal SSL tunnel for network daemons, is prone to a buffer overflow vulnerability when using the Microsoft NT LAN Manager (NTLM) authentication ("protocolAuthentication = NTLM") together with the 'connect' protocol method ("protocol = connect"). With these prerequisites and using stunnel4 in SSL client mode ("client = yes") on a 64bit host, an attacker could possibly execute arbitrary code with the privileges of the stunnel process, if the attacker can either control the specified proxy server or perform man-in-the-middle attacks on the tcp session between stunnel and the proxy sever. Note that for the testing distribution (wheezy) and the unstable distribution (sid), stunnel4 is compiled with stack smashing protection enabled, which should help protect against arbitrary code execution. For the stable distribution (squeeze), this problem has been fixed in version 3:4.29-1+squeeze1. For the testing distribution (wheezy), this problem has been fixed in version 3:4.53-1.1. For the unstable distribution (sid), this problem has been fixed in version 3:4.53-1.1. We recommend that you upgrade your stunnel4 packages. Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: http://www.debian.org/security/ Mailing list: debian-security-announce@xxxxxxxxxxxxxxxx -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJRgp6PAAoJEFb2GnlAHawE7DwIAJskgGuHuBXUqkRmOdhKQJC2 AfqPFpO/fBjyTvY4Cx/M0nUSOA/4kz0/gG12col4/rZxgitJqsfDTgNa9k2xohdO frWdlOIUmF6dbQKzx9nfcRQC5yTDgUPdEp2daLre6CtOm5rldoKktdTmznLe3/73 H6WbI+WZqjGgohQQwb2RdaPE4SsKmjIefXFajh71mmQgw5YvythhM0fgkGpgJT4A 6U+CCNweEk8VgEJwkHSjdKvUbeRb7c3aRi7GX18w6dFtCbHWNSkqBIBU9JHn5PlZ jflCaOg1G3W7yVyobJqNFxskv65wbMnurx5UoUjfnaRLXcwE26Da98jKDV/Toqg= =HwjK -----END PGP SIGNATURE-----
