a new version of libupnp came in tonight, adressing this issue.
Changelog:
libupnp (1:1.6.17-1.2) unstable; urgency=high
* Non-maintainer upload by the Security Team.
* debian/patches/0001-Security-fix-for-CERT-issue-VU-922681 added, fix
various stack-based buffer overflows in service_unique_name() function.
This fix CVE-2012-5958, CVE-2012-5959, CVE-2012-5960, CVE-2012-5961,
CVE-2012-5962, CVE-2012-5963, CVE-2012-5964, CVE-2012-5965. closes: #699316
greetz
devil