CVE-2018-1139: Input Validation
First published: Mon Jun 11 2018(Updated: )
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 read the credential and other details passed between the samba server and client.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Samba Samba | >=4.7.0<4.7.9 | |
| Samba Samba | >=4.8.0<4.8.4 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Redhat Enterprise Linux Desktop | =7.0 | |
| Redhat Enterprise Linux Server | =7.0 | |
| Redhat Enterprise Linux Workstation | =7.0 | |
| redhat/samba | <4.7.9 | 4.7.9 |
| redhat/samba | <4.8.4 | 4.8.4 |
| ubuntu/samba | <2:4.7.6+dfsg~ubuntu-0ubuntu2.2 | 2:4.7.6+dfsg~ubuntu-0ubuntu2.2 |
| ubuntu/samba | <4.7.9<4.8.4 | 4.7.9 4.8.4 |
| debian/samba | 2:4.13.13+dfsg-1~deb11u6 2:4.17.12+dfsg-0+deb12u1 2:4.21.0~rc1+really4.20.4+dfsg-1 |
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Reference Links
- http://www.securityfocus.com/bid/105084
- https://access.redhat.com/errata/RHSA-2018:2612
- https://access.redhat.com/errata/RHSA-2018:2613
- https://access.redhat.com/errata/RHSA-2018:3056
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1139
- https://security.gentoo.org/glsa/202003-52
- https://security.netapp.com/advisory/ntap-20180814-0001/
- https://usn.ubuntu.com/3738-1/
- https://www.samba.org/samba/security/CVE-2018-1139.html
- https://launchpad.net/bugs/cve/CVE-2018-1139
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1617916
- https://bugzilla.redhat.com/show_bug.cgi?id=1589651
- https://security-tracker.debian.org/tracker/CVE-2018-1139
- https://ubuntu.com/security/notices/USN-3738-1
- https://www.cve.org/CVERecord?id=CVE-2018-1139
- https://nvd.nist.gov/vuln/detail/CVE-2018-1139
- https://ubuntu.com/security/CVE-2018-1139
Frequently Asked Questions
What is CVE-2018-1139?
CVE-2018-1139 is a vulnerability in Samba that allows the use of weak NTLMv1 authentication.
What is the severity of CVE-2018-1139?
CVE-2018-1139 has a severity rating of 8.1 (high).
How does CVE-2018-1139 affect Samba?
CVE-2018-1139 affects Samba versions before 4.7.9 and 4.8.4.
How can a man-in-the-middle attacker exploit CVE-2018-1139?
A man-in-the-middle attacker can exploit CVE-2018-1139 to read the credential and other details passed between the Samba server and client.
Where can I find more information about CVE-2018-1139?
You can find more information about CVE-2018-1139 on the Samba website, the RedHat Bugzilla page, and the RedHat errata page.
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