high
7.5
CWE
358
Advisory Published
CVE Published
Updated

CVE-2018-16860

First published: Tue May 14 2019(Updated: )

A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.

Credit: Isaac Boukris Andrew Bartlett the Samba TeamCatalyst Isaac Boukris Andrew Bartlett the Samba TeamCatalyst Isaac Boukris Andrew Bartlett the Samba TeamCatalyst Isaac Boukris Andrew Bartlett the Samba TeamCatalyst secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
debian/heimdal<=7.1.0+dfsg-13<=7.1.0+dfsg-13+deb9u2<=7.5.0+dfsg-2.1
7.5.0+dfsg-3
7.1.0+dfsg-13+deb9u3
Samba Samba>=4.8.0<4.8.12
Samba Samba>=4.9.0<4.9.8
Samba Samba>=4.10.0<4.10.3
Heimdal Project Heimdal>=0.8<=7.5.0
Apple watchOS<5.3
5.3
Apple macOS Mojave<10.14.6
10.14.6
Apple High Sierra
Apple Sierra
Apple tvOS<12.4
12.4
Apple iOS<12.4
12.4
debian/heimdal
7.7.0+dfsg-2+deb11u3
7.8.git20221117.28daf24+dfsg-2
7.8.git20221117.28daf24+dfsg-8
debian/samba
2:4.13.13+dfsg-1~deb11u6
2:4.17.12+dfsg-0+deb12u1
2:4.21.1+dfsg-2

Remedy

https://github.com/heimdal/heimdal/commit/c6257cc2c842c0faaeb4ef34e33890ee88c4cbba

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2018-16860?

    The severity of CVE-2018-16860 is high.

  • What is the affected software for CVE-2018-16860?

    The affected software for CVE-2018-16860 is samba's Heimdal KDC implementation versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8, and 4.10.x up to, excluding 4.10.3 when used in AD DC mode.

  • How does CVE-2018-16860 affect the system?

    CVE-2018-16860 allows a man-in-the-middle attacker to intercept requests to the KDC and replace the user name.

  • How can I fix CVE-2018-16860?

    To fix CVE-2018-16860, update to version 4.8.12 or later for 4.8.x, update to version 4.9.8 or later for 4.9.x, and update to version 4.10.3 or later for 4.10.x.

  • Where can I find more information about CVE-2018-16860?

    More information about CVE-2018-16860 can be found at the following references: [CVE-2018-16860](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16860), [Samba Security](https://www.samba.org/samba/security/CVE-2018-16860.html), [Ubuntu Security Notices](https://ubuntu.com/security/notices/USN-3976-1).

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