CVE-2017-11103
Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification.
02 Description
Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre attacks because it obtains service-principal names in a way that violates the Kerberos 5 protocol specification.
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
- 5.11% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 92.1% 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
- Important. 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
- 2017-07-13 13:00Z9 YR AGO
- Last updated
- 2024-08-05 17:57Z2 YR AGO
- Reserved
- 2017-07-07
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 788c488add9ee9658494f07b1d4035b250a5aa16fc61c79c40ab7badc3fe4653
05 Affected products
06 References
- support.apple.comhttps://support.apple.com/HT208221
- www.debian.orgDSA-3912http://www.debian.org/security/2017/dsa-3912
- support.apple.comhttps://support.apple.com/HT208144
- www.orpheus-lyre.infohttps://www.orpheus-lyre.info/
- www.freebsd.orgFreeBSD-SA-17:05https://www.freebsd.org/security/advisories/FreeBSD-SA-17:05.heimdal.asc
- www.securityfocus.com99551http://www.securityfocus.com/bid/99551
- www.securitytracker.com1039427http://www.securitytracker.com/id/1039427
- www.samba.orghttps://www.samba.org/samba/security/CVE-2017-11103.html
- www.securitytracker.com1038876http://www.securitytracker.com/id/1038876
- support.apple.comhttps://support.apple.com/HT208112
- github.comhttps://github.com/heimdal/heimdal/releases/tag/heimdal-7.4.0
- www.h5l.orghttp://www.h5l.org/advisories.html?show=2017-07-11
07 Fixed in
Debian 12
- heimdal Fixed in 7.4.0.dfsg.1-1
- samba Fixed in 2:4.6.5+dfsg-4
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- heimdal Fixed in 7.4.0.dfsg.1-1
- samba Fixed in 2:4.6.5+dfsg-4
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- heimdal Fixed in 7.4.0.dfsg.1-1
- samba Fixed in 2:4.6.5+dfsg-4
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- heimdal Fixed in 1.6~git20131207+dfsg-1ubuntu1.2
- samba Fixed in 2:4.3.11+dfsg-0ubuntu0.14.04.10
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- heimdal Fixed in 1.7~git20150920+dfsg-4ubuntu1.16.04.1
- samba Fixed in 2:4.3.11+dfsg-0ubuntu0.16.04.9
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.