VDB

CVE-2017-11103

CVE-2017-11103 PUBLISHED CVSS 8.100000381469727 HIGH

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. In _krb5_extract_ticket() the KDC-REP service name must be obtained from the encrypted version stored in 'enc_part' instead of the unencrypted version stored in 'ticket'. Use of the unencrypted version provides an opportunity for successful server impersonation and other attacks. NOTE: this CVE is only for Heimdal and other products that embed Heimdal code; it does not apply to other instances in which this part of the Kerberos 5 protocol specification is violated.

EPSS 5.12% · 92.1th percentile

Risk Scores

CVSS 3.1
8.100000381469727
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
5.12%
92.1th percentile

Affected Products

VendorProductVersions
Ubuntu:14.04:LTSheimdal1.6~git20120403+dfsg1-3ubuntu0.1, 1.6~git20131207+dfsg-1ubuntu1, 1.6~git20131207+dfsg-1ubuntu1.1
Ubuntu:16.04:LTSheimdal0, 1.6~rc2+dfsg-10ubuntu1, *
Ubuntu:16.04:LTSsamba0, 2:4.1.17+dfsg-4ubuntu2, 2:4.1.20+dfsg-1ubuntu1
Ubuntu:14.04:LTSsamba*, *, 0

Timeline

  • Jul 10, 2017 CVE Published
  • Apr 14, 2021 EPSS Score
  • Jun 23, 2021 EPSS Score
  • Oct 26, 2021 EPSS Score
  • Dec 28, 2021 EPSS Score
  • Mar 1, 2022 EPSS Score
  • May 3, 2022 EPSS Score
  • Jul 4, 2022 EPSS Score
  • Nov 8, 2022 EPSS Score
  • Jan 10, 2023 EPSS Score
  • Mar 7, 2023 EPSS Score
  • May 8, 2023 EPSS Score

References

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