CVE-2017-11368
In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.
02 Description
In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.
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
- 2.39% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 83.7% 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:3.0/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
- 2017-08-09 18:00Z9 YR AGO
- Last updated
- 2024-08-05 18:05Z2 YR AGO
- Reserved
- 2017-07-17
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-617Reachable AssertionBase
- Data version
- 5.1
- Document digest
- 50498fad02e3e349c1c26e818f0b99e8b31dda9eb4d9730d201d7adf7e956784
05 Affected products
06 References
- github.comhttps://github.com/krb5/krb5/commit/ffb35baac6981f9e8914f8f3bffd37f284b85970
- lists.fedoraproject.orgFEDORA-2017-e5b36383f4https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HNWXM6OQU7G23MG7XWIOBRGP43ECLDT/
- access.redhat.comRHSA-2018:0666https://access.redhat.com/errata/RHSA-2018:0666
- www.securityfocus.com100291http://www.securityfocus.com/bid/100291
- lists.fedoraproject.orgFEDORA-2017-8e9d9771c4https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBUTXMNZWMVJLQ4NDX5OQFPUVCJRLV3W/
07 Fixed in
Arch Linux
- krb5 Fixed in 1.15.2-1
- lib32-krb5 Not affected
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- krb5 Fixed in 1.15.1-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- krb5 Fixed in 1.15.1-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- krb5 Fixed in 1.15.1-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- krb5 Fixed in 1.12+dfsg-2ubuntu5.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- krb5 Fixed in 1.13.2+dfsg-5ubuntu2.1
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.