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Ubuntu 18.04 LTS / 20.04 LTS : PostgreSQL vulnerabilities (USN-5038-1)

medium Nessus Plugin ID 152539

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Synopsis

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

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS / 21.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5038-1 advisory.

 - A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting. (CVE-2021-3677)

 - An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j). (CVE-2021-3449)

Note that Nessus has not tested for this issue 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-5038-1

Plugin Details

Severity: Medium

ID: 152539

File Name: ubuntu_USN-5038-1.nasl

Version: 1.11

Type: local

Agent: unix

Published: 8/13/2021

Updated: 11/1/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.3

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

CVSS Score Source: CVE-2021-3677

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 6

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libecpg-compat3, p-cpe:/a:canonical:ubuntu_linux:libecpg-dev, p-cpe:/a:canonical:ubuntu_linux:libecpg6, p-cpe:/a:canonical:ubuntu_linux:libpgtypes3, p-cpe:/a:canonical:ubuntu_linux:libpq-dev, p-cpe:/a:canonical:ubuntu_linux:libpq5, p-cpe:/a:canonical:ubuntu_linux:postgresql-10, p-cpe:/a:canonical:ubuntu_linux:postgresql-12, p-cpe:/a:canonical:ubuntu_linux:postgresql-client-10, p-cpe:/a:canonical:ubuntu_linux:postgresql-client-12, p-cpe:/a:canonical:ubuntu_linux:postgresql-plperl-10, p-cpe:/a:canonical:ubuntu_linux:postgresql-plperl-12, p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython-10, p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython3-10, p-cpe:/a:canonical:ubuntu_linux:postgresql-plpython3-12, p-cpe:/a:canonical:ubuntu_linux:postgresql-pltcl-10, p-cpe:/a:canonical:ubuntu_linux:postgresql-pltcl-12, p-cpe:/a:canonical:ubuntu_linux:postgresql-server-dev-10, p-cpe:/a:canonical:ubuntu_linux:postgresql-server-dev-12

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/12/2021

Vulnerability Publication Date: 3/25/2021

Reference Information

CVE: CVE-2021-3449, CVE-2021-3677

IAVA: 2021-A-0149-S, 2021-A-0193-S

IAVB: 2021-B-0048-S

USN: 5038-1