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CVE-2023-27533

Published: 20 March 2023

A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform option negotiation without the application's intent. This vulnerability could be exploited if an application allows user input, thereby enabling attackers to execute arbitrary code on the system.

Priority

Low

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
curl
Launchpad, Ubuntu, Debian
lunar
Released (7.88.1-6ubuntu2)
upstream Pending
(8.0.0)
xenial
Released (7.47.0-1ubuntu2.19+esm8)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (7.58.0-2ubuntu3.24)
focal
Released (7.68.0-1ubuntu2.18)
jammy
Released (7.81.0-1ubuntu1.10)
kinetic
Released (7.85.0-1ubuntu0.5)
trusty
Released (7.35.0-1ubuntu2.20+esm15)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Patches:
upstream: https://github.com/curl/curl/commit/538b1e79a6e7b

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H