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ubuntuUbuntuUSN-5787-2
HistoryJan 09, 2023 - 12:00 a.m.

Libksba vulnerability

2023-01-0900:00:00
ubuntu.com
45
ubuntu 16.04 esm
ubuntu 14.04 esm
libksba
x.509
cms
parsing crl signatures
denial of service
execute arbitrary code
vulnerability fix

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

10 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

65.8%

Releases

  • Ubuntu 16.04 ESM
  • Ubuntu 14.04 ESM

Packages

  • libksba - X.509 and CMS support library

Details

USN-5787-1 fixed vulnerabilities in Libksba. This update provides the
corresponding updates for Ubuntu 16.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that Libksba incorrectly handled parsing CRL signatures.
A remote attacker could use this issue to cause Libksba to crash, resulting
in a denial of service, or possibly execute arbitrary code.

OSVersionArchitecturePackageVersionFilename
Ubuntu16.04noarchlibksba8< 1.3.3-1ubuntu0.16.04.1+esm2UNKNOWN
Ubuntu16.04noarchlibksba-dev< 1.3.3-1ubuntu0.16.04.1UNKNOWN
Ubuntu16.04noarchlibksba8< 1.3.3-1ubuntu0.16.04.1UNKNOWN
Ubuntu16.04noarchlibksba8-dbgsym< 1.3.3-1ubuntu0.16.04.1UNKNOWN
Ubuntu14.04noarchlibksba8< 1.3.0-3ubuntu0.14.04.2+esm2UNKNOWN
Ubuntu14.04noarchlibksba-dev< 1.3.0-3ubuntu0.14.04.2UNKNOWN
Ubuntu14.04noarchlibksba8< 1.3.0-3ubuntu0.14.04.2UNKNOWN
Ubuntu14.04noarchlibksba8-dbgsym< 1.3.0-3ubuntu0.14.04.2UNKNOWN

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

10 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

65.8%