Debian Security Advisory
DSA-4135-1 samba -- security update
- Date Reported:
- 13 Mar 2018
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2018-1050, CVE-2018-1057.
- More information:
Several vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix. The Common Vulnerabilities and Exposures project identifies the following issues:
It was discovered that Samba is prone to a denial of service attack when the RPC spoolss service is configured to be run as an external daemon.
Bjoern Baumbach from Sernet discovered that on Samba 4 AD DC the LDAP server incorrectly validates permissions to modify passwords over LDAP allowing authenticated users to change any other users passwords, including administrative users.
For the oldstable distribution (jessie), CVE-2018-1050 will be addressed in a later update. Unfortunately the changes required to fix CVE-2018-1057 for Debian oldstable are too invasive to be backported. Users using Samba as an AD-compatible domain controller are encouraged to apply the workaround described in the Samba wiki and upgrade to Debian stretch.
For the stable distribution (stretch), these problems have been fixed in version 2:4.5.12+dfsg-2+deb9u2.
We recommend that you upgrade your samba packages.
For the detailed security status of samba please refer to its security tracker page at: https://security-tracker.debian.org/tracker/samba