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Debian dla-3719 : php-seclib - security update

critical Nessus Plugin ID 189491

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 10 host has a package installed that is affected by a vulnerability as referenced in the dla-3719 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-3719-1 [email protected] https://www.debian.org/lts/security/ Guilhem Moulin January 25, 2024 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : phpseclib Version : 1.0.19-3~deb10u2 CVE ID : CVE-2023-48795

 It was discovered that phpseclib, a PHP library for arbitrary-precision integer arithmetic, was vulnerable to the so-called Terrapin Attack.

 The SSH transport protocol with certain OpenSSH extensions, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC).

 For Debian 10 buster, this problem has been fixed in version 1.0.19-3~deb10u2.

 We recommend that you upgrade your phpseclib packages.

 For the detailed security status of phpseclib please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/phpseclib

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
 signature.asc Description: PGP signature

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

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

Solution

Upgrade the php-seclib packages.

See Also

https://security-tracker.debian.org/tracker/source-package/phpseclib

https://security-tracker.debian.org/tracker/CVE-2023-48795

https://packages.debian.org/source/buster/phpseclib

Plugin Details

Severity: Critical

ID: 189491

File Name: debian_DLA-3719.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/25/2024

Updated: 1/22/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.1

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.2

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

CVSS Score Source: CVE-2023-48795

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.3

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:php-seclib

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/25/2024

Vulnerability Publication Date: 12/18/2023

Reference Information

CVE: CVE-2023-48795