CVE-2018-16860: High severity tvos vulnerability
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.
Other sources
Heimdal. This issue was addressed with improved checks to prevent unauthorized actions.
Credit
Affected Software
Remediation
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2019-9506
- CVE-2020-10135
- CVE-2019-8646
- CVE-2019-8647
- CVE-2019-8660
- CVE-2019-8702
- CVE-2018-16860
- CVE-2019-8668
- CVE-2019-13118
- CVE-2019-8698
- CVE-2019-8662
- CVE-2019-8657
- CVE-2019-8690
- CVE-2019-8649
- CVE-2019-8658
- CVE-2019-8644
- CVE-2019-8666
- CVE-2019-8669
- CVE-2019-8671
- CVE-2019-8672
- CVE-2019-8673
- CVE-2019-8676
- CVE-2019-8677
- CVE-2019-8678
- CVE-2019-8679
- CVE-2019-8680
- CVE-2019-8681
- CVE-2019-8683
- CVE-2019-8684
- CVE-2019-8685
- CVE-2019-8686
- CVE-2019-8687
- CVE-2019-8688
- CVE-2019-8689
- CVE-2019-8693
- CVE-2019-8656
- CVE-2018-19860
- CVE-2019-8661
- CVE-2019-8675
- CVE-2019-8696
- CVE-2019-8539
- CVE-2019-8697
- CVE-2019-8648
- CVE-2019-8663
- CVE-2019-8695
- CVE-2019-8691
- CVE-2019-8692
- CVE-2019-8694
- CVE-2019-8670
- CVE-2019-8701
- CVE-2019-8667
- CVE-2019-8624
- CVE-2019-8633
- CVE-2019-8659
- CVE-2019-8665
- CVE-2019-8682
- CVE-2019-8699
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).