Debian DLA-2773-1 : curl - LTS security update

critical Nessus Plugin ID 153845

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2773 advisory.

Two issues have been found in curl, a command line tool and an easy-to-use client-side library for transferring data with URL syntax. CVE-2021-22946 Crafted answers from a server might force clients to not use TLS on connections though TLS was required and expected. CVE-2021-22947 When using STARTTLS to initiate a TLS connection, the server might send multiple answers before the TLS upgrade and such the client would handle them as being trusted. This could be used by a MITM-attacker to inject fake response data. For Debian 9 stretch, these problems have been fixed in version 7.52.1-5+deb9u16. We recommend that you upgrade your curl packages. For the detailed security status of curl please refer to its security tracker page at: https://security-tracker.debian.org/tracker/curl 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

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the curl packages.

For Debian 9 stretch, these problems have been fixed in version 7.52.1-5+deb9u16.

Plugin Details

Severity: Critical

ID: 153845

File Name: debian_DLA-2773.nasl

Version: 1.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/3/2021

Updated: 1/24/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

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

CVSS Score Source: CVE-2021-22946

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

CVSS Score Source: CVE-2021-22947

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:curl, p-cpe:/a:debian:debian_linux:libcurl3, p-cpe:/a:debian:debian_linux:libcurl3-nss, cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:libcurl4-gnutls-dev, p-cpe:/a:debian:debian_linux:libcurl3-dbg, p-cpe:/a:debian:debian_linux:libcurl3-gnutls, p-cpe:/a:debian:debian_linux:libcurl4-doc, p-cpe:/a:debian:debian_linux:libcurl4-nss-dev, p-cpe:/a:debian:debian_linux:libcurl4-openssl-dev

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: 9/30/2021

Vulnerability Publication Date: 9/17/2021

Reference Information

CVE: CVE-2021-22946, CVE-2021-22947

Detections

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