7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
6 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:P/I:P/A:P
0.005 Low
EPSS
Percentile
76.7%
Medium
Canonical Ubuntu
Isaac Boukris and Andrew Bartlett discovered that Heimdal’s KDC was not properly performing checksum algorithm verifications in the S4U2Self extension module. An attacker could possibly use this issue to perform a machine-in-the-middle attack and request S4U2Self tickets for any user known by the application. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. (CVE-2018-16860) It was discovered that Heimdal was not properly handling the verification of key exchanges when an anonymous PKINIT was being used. An attacker could possibly use this issue to perform a machine-in-the-middle attack and expose sensitive information. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. (CVE-2019-12098) Joseph Sutton discovered that Heimdal was not properly handling memory management operations when dealing with TGS-REQ tickets that were missing information. An attacker could possibly use this issue to cause a denial of service. (CVE-2021-3671) Michał Kępień discovered that Heimdal was not properly handling logical conditions that related to memory management operations. An attacker could possibly use this issue to cause a denial of service. (CVE-2022-3116) Update Instructions: Run sudo pro fix USN-5675-1
to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libhcrypto4-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libwind0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libroken18-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libgssapi3-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-kcm – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libhdb9-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libasn1-8-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libsl0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkadm5clnt7-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-kdc – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkdc2-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-servers – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libheimntlm0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-docs – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libheimbase1-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkrb5-26-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libotp0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-dev – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkafs0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libhx509-5-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-multidev – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkadm5srv8-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-clients – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
CVEs contained in this USN include: CVE-2018-16860, CVE-2021-3671, CVE-2019-12098, CVE-2022-3116.
Severity is medium unless otherwise noted.
Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:
2022-12-07: Initial vulnerability report published.
CPE | Name | Operator | Version |
---|---|---|---|
bionic stemcells | lt | 1.122 | |
cflinuxfs3 | lt | 0.328.0 | |
cf deployment | lt | 23.0.0 |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
6 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:P/I:P/A:P
0.005 Low
EPSS
Percentile
76.7%