CVE-2018-16851
Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the
02 Description
Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.25% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 88.2% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2018-11-28 14:00Z7 YR AGO
- Last updated
- 2024-08-05 10:32Z2 YR AGO
- Reserved
- 2018-09-11
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.5)
- CNA CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-476NULL Pointer DereferenceBase
- Data version
- 5.1
- Document digest
- 5eace53c284970c0b2e97a20623b32550add489c70206c8eaac7ed735ebe29ea
05 Affected products
06 References
- www.securityfocus.com106027http://www.securityfocus.com/bid/106027
- usn.ubuntu.comUSN-3827-2https://usn.ubuntu.com/3827-2/
- usn.ubuntu.comUSN-3827-1https://usn.ubuntu.com/3827-1/
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20181127-0001/
- lists.debian.org[debian-lts-announce] 20181215 [SECURITY] [DLA 1607-1] samba security updatehttps://lists.debian.org/debian-lts-announce/2018/12/msg00005.html
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851
- www.debian.orgDSA-4345https://www.debian.org/security/2018/dsa-4345
- www.samba.orghttps://www.samba.org/samba/security/CVE-2018-16851.html
- security.gentoo.orgGLSA-202003-52https://security.gentoo.org/glsa/202003-52
07 Fixed in
Arch Linux
- samba Fixed in 4.9.3-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- samba Fixed in 2:4.9.2+dfsg-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- samba Fixed in 2:4.9.2+dfsg-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- samba Fixed in 2:4.9.2+dfsg-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- samba Fixed in 2:4.3.11+dfsg-0ubuntu0.14.04.19
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- samba Fixed in 2:4.3.11+dfsg-0ubuntu0.16.04.18
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- samba Fixed in 2:4.7.6+dfsg~ubuntu-0ubuntu2.5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.