SB2020120928 - Uncontrolled Recursion in curl (Alpine package)

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Main Vulnerability Database SB2020120928

SB2020120928 - Uncontrolled Recursion in curl (Alpine package)

Published: December 9, 2020 Updated: October 28, 2023

Security Bulletin ID SB2020120928
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Uncontrolled Recursion (CVE-ID: CVE-2020-8285)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due tu uncontrolled recursion when processing FTP responses within the wildcard matching functionality, which allows a callback (set with <a href="https://curl.se/libcurl/c/CURLOPT_CHUNK_BGN_FUNCTION.html">CURLOPT_CHUNK_BGN_FUNCTION</a>) to return information back to libcurl on how to handle a specific entry in a directory when libcurl iterates over a list of all available entries. A remote attacker who controls the malicious FTP server can trick the victim to connect to it and crash the application, which is using the affected libcurl version.


Remediation

Install update from vendor's website.

References