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CVE-2023-27533

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-5964-1
Posted Mar 21, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5964-1 - Harry Sintonen discovered that curl incorrectly handled certain TELNET connection options. Due to lack of proper input scrubbing, curl could pass on user name and telnet options to the server as provided, contrary to expectations. Harry Sintonen discovered that curl incorrectly handled special tilde characters when used with SFTP paths. A remote attacker could possibly use this issue to circumvent filtering.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2023-27533, CVE-2023-27534, CVE-2023-27535, CVE-2023-27536, CVE-2023-27538
SHA-256 | 7303af9763b09b697c1acbc39214d51f90dd82cd2f8e2e8bd2040d6a4b2ec3e8
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