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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : ldb vulnerabilities (USN-4888-1)

high Nessus Plugin ID 148089

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4888-1 advisory.

 Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain LDAP attributes. A remote attacker could possibly use this issue to cause the LDAP server to crash, resulting in a denial of service. (CVE-2021-20277)

 Douglas Bagnall discovered that ldb, when used with Samba, incorrectly handled certain DN strings. A remote attacker could use this issue to cause the LDAP server to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-27840)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-4888-1

Plugin Details

Severity: High

ID: 148089

File Name: ubuntu_USN-4888-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 3/24/2021

Updated: 8/28/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-20277

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libldb-dev, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libldb1, p-cpe:/a:canonical:ubuntu_linux:python3-ldb-dev, p-cpe:/a:canonical:ubuntu_linux:python3-ldb, p-cpe:/a:canonical:ubuntu_linux:ldb-tools, p-cpe:/a:canonical:ubuntu_linux:python-ldb-dev, p-cpe:/a:canonical:ubuntu_linux:python-ldb, p-cpe:/a:canonical:ubuntu_linux:libldb2

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 3/24/2021

Vulnerability Publication Date: 3/24/2021

Reference Information

CVE: CVE-2020-27840, CVE-2021-20277

IAVA: 2021-A-0140-S

USN: 4888-1