NULL Pointer Dereference Affecting samba package, versions <2:4.9.2+dfsg-2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published2 Dec 2018
- disclosed28 Nov 2018
Introduced: 28 Nov 2018
CVE-2018-16852 (opens in a new tab)How to fix?
Upgrade Debian:unstable samba to version 2:4.9.2+dfsg-2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream samba package and not the samba package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Samba from version 4.9.0 and before version 4.9.3 is vulnerable to a NULL pointer de-reference. During the processing of an DNS zone in the DNS management DCE/RPC server, the internal DNS server or the Samba DLZ plugin for BIND9, if the DSPROPERTY_ZONE_MASTER_SERVERS property or DSPROPERTY_ZONE_SCAVENGING_SERVERS property is set, the server will follow a NULL pointer and terminate. There is no further vulnerability associated with this issue, merely a denial of service.
References
- https://security-tracker.debian.org/tracker/CVE-2018-16852
- https://www.samba.org/samba/security/CVE-2018-16852.html
- https://security.gentoo.org/glsa/202003-52
- https://security.netapp.com/advisory/ntap-20181127-0001/
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16852
- http://www.securityfocus.com/bid/106024