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CVE-2017-11103

Status Candidate

Overview

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.

Related Files

Apple Security Advisory 2017-10-31-9
Posted Nov 1, 2017
Authored by Apple | Site apple.com

Apple Security Advisory 2017-10-31-9 - iOS 11 addresses TLS weaknesses, denial of service, arbitrary code execution, and various other vulnerabilities.

tags | advisory, denial of service, arbitrary, vulnerability, code execution
systems | cisco, apple, ios
advisories | CVE-2016-9063, CVE-2016-9840, CVE-2016-9841, CVE-2016-9842, CVE-2016-9843, CVE-2017-0381, CVE-2017-1000373, CVE-2017-10989, CVE-2017-11103, CVE-2017-11120, CVE-2017-11121, CVE-2017-13782, CVE-2017-13812, CVE-2017-13813, CVE-2017-13814, CVE-2017-13815, CVE-2017-13816, CVE-2017-13817, CVE-2017-13818, CVE-2017-13821, CVE-2017-13822, CVE-2017-13825, CVE-2017-13828, CVE-2017-13830, CVE-2017-13831, CVE-2017-13832, CVE-2017-13834
MD5 | 60d493af6335566be6f6af354b214a48
Apple Security Advisory 2017-10-31-2
Posted Nov 1, 2017
Authored by Apple | Site apple.com

Apple Security Advisory 2017-10-31-2 - macOS High Sierra 10.13.1, Security Update 2017-001 Sierra, Security Update 2017-004 El Capitan are now available and address TLS weaknesses, issues in Apache, and many more vulnerabilities.

tags | advisory, vulnerability
systems | apple
advisories | CVE-2016-2161, CVE-2016-4736, CVE-2016-5387, CVE-2016-8740, CVE-2016-8743, CVE-2017-1000100, CVE-2017-1000101, CVE-2017-11103, CVE-2017-11108, CVE-2017-11541, CVE-2017-11542, CVE-2017-11543, CVE-2017-12893, CVE-2017-12894, CVE-2017-12895, CVE-2017-12896, CVE-2017-12897, CVE-2017-12898, CVE-2017-12899, CVE-2017-12900, CVE-2017-12901, CVE-2017-12902, CVE-2017-12985, CVE-2017-12986, CVE-2017-12987, CVE-2017-1298
MD5 | 0a3f85251303c010a3fa74783867a502
Apple Security Advisory 2017-09-25-4
Posted Sep 28, 2017
Authored by Apple | Site apple.com

Apple Security Advisory 2017-09-25-4 - iOS 11 addresses denial of service, service impersonation, and various other vulnerabilities.

tags | advisory, denial of service, vulnerability
systems | cisco, apple, ios
advisories | CVE-2016-9063, CVE-2016-9840, CVE-2016-9841, CVE-2016-9842, CVE-2016-9843, CVE-2017-0381, CVE-2017-1000373, CVE-2017-10989, CVE-2017-11103, CVE-2017-11120, CVE-2017-11121, CVE-2017-7072, CVE-2017-7078, CVE-2017-7080, CVE-2017-7081, CVE-2017-7083, CVE-2017-7085, CVE-2017-7086, CVE-2017-7087, CVE-2017-7088, CVE-2017-7089, CVE-2017-7090, CVE-2017-7091, CVE-2017-7092, CVE-2017-7093, CVE-2017-7094, CVE-2017-7095, CVE-2017-7096
MD5 | 7de43f34b082d4813011558c39658d04
Apple Security Advisory 2017-09-25-1
Posted Sep 28, 2017
Authored by Apple | Site apple.com

Apple Security Advisory 2017-09-25-1 - macOS High Sierra 10.13 is now available and addresses denial of service, insecure transit, and various other vulnerabilities.

tags | advisory, denial of service, vulnerability
systems | apple
advisories | CVE-2016-9042, CVE-2016-9063, CVE-2016-9840, CVE-2016-9841, CVE-2016-9842, CVE-2016-9843, CVE-2017-0381, CVE-2017-1000373, CVE-2017-10989, CVE-2017-11103, CVE-2017-6451, CVE-2017-6452, CVE-2017-6455, CVE-2017-6458, CVE-2017-6459, CVE-2017-6460, CVE-2017-6462, CVE-2017-6463, CVE-2017-6464, CVE-2017-7074, CVE-2017-7077, CVE-2017-7078, CVE-2017-7080, CVE-2017-7082, CVE-2017-7083, CVE-2017-7084, CVE-2017-7086, CVE-2017-7114
MD5 | afcf3a39067601a76d9858d678ec3ae1
Ubuntu Security Notice USN-3353-4
Posted Jul 24, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3353-4 - USN-3353-1 fixed a vulnerability in Heimdal. This update provides the corresponding update for Samba. Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered that Samba clients incorrectly trusted unauthenticated portions of Kerberos tickets. A remote attacker could use this to impersonate trusted network services or perform other attacks. Various other issues were also addressed.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2017-11103
MD5 | dd356174d4dc120cafdbb3f3788aed1d
Ubuntu Security Notice USN-3353-3
Posted Jul 24, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3353-3 - USN-3353-1 fixed a vulnerability in Heimdal. This update provides the corresponding update for Ubuntu 12.04 ESM.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2017-11103
MD5 | 9f922f5f78d08f4481fbacb90821d3af
Ubuntu Security Notice USN-3353-2
Posted Jul 14, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3353-2 - USN-3353-1 fixed a vulnerability in Heimdal. This update provides the corresponding update for Samba. Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered that Samba clients incorrectly trusted unauthenticated portions of Kerberos tickets. A remote attacker could use this to impersonate trusted network servers or perform other attacks.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2017-11103
MD5 | 58e0ef79e0e7c5ad4201a654bb0cb440
Ubuntu Security Notice USN-3353-1
Posted Jul 14, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3353-1 - Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered that Heimdal clients incorrectly trusted unauthenticated portions of Kerberos tickets. A remote attacker could use this to impersonate trusted network services or perform other attacks.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2017-11103
MD5 | f41fb95fe553cf1266479bdfe22ad0d2
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