CVE-2018-1139
A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to
02 Description
A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to
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
- 3.10% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 87.6% of scored records. A rank, not a probability.
- NVD base score
- 8.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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
- 2018-08-22 14:00Z8 YR AGO
- Last updated
- 2024-08-05 03:51Z2 YR AGO
- Reserved
- 2017-12-04
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.4)
- CNA CVSS vector
- CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weaknesses
- Data version
- 5.1
- Document digest
- 186a2289e3cf05b9b8bf5ae8e6d2e4fea7501d3c9089ebc23dfe0a1d301f37ee
05 Affected products
06 References
- access.redhat.comRHSA-2018:2613https://access.redhat.com/errata/RHSA-2018:2613
- usn.ubuntu.comUSN-3738-1https://usn.ubuntu.com/3738-1/
- access.redhat.comRHSA-2018:2612https://access.redhat.com/errata/RHSA-2018:2612
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1139
- www.securityfocus.com105084http://www.securityfocus.com/bid/105084
- access.redhat.comRHSA-2018:3056https://access.redhat.com/errata/RHSA-2018:3056
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20180814-0001/
- www.samba.orghttps://www.samba.org/samba/security/CVE-2018-1139.html
- security.gentoo.orgGLSA-202003-52https://security.gentoo.org/glsa/202003-52
07 Fixed in
Debian 12
- samba Fixed in 2:4.8.4+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- samba Fixed in 2:4.8.4+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- samba Fixed in 2:4.8.4+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- samba Fixed in 2:4.7.6+dfsg~ubuntu-0ubuntu2.2
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.