Bug#858143: xrdp: CVE-2017-6967: incorrect placement of auth_start_session()

[Salvatore Bonaccorso]

Source: xrdp
Version: 0.9.1-7
Severity: important
Tags: security upstream patch
Forwarded: https://github.com/neutrinolabs/xrdp/issues/350

Hi,

the following vulnerability was published for xrdp.

CVE-2017-6967[0]:
| xrdp 0.9.1 calls the PAM function auth_start_session() in an incorrect
| location, leading to PAM session modules not being properly
| initialized, with a potential consequence of incorrect configurations
| or elevation of privileges, aka a pam_limits.so bypass.

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2017-6967
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6967
[1] http://www.openwall.com/lists/oss-security/2017/03/18/1

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore