SB2021021905 - Denial of service in curl implementation for Command Line Interface, EAV Monitors, iRules components in F5 BIG-IP products

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Main Vulnerability Database SB2021021905

SB2021021905 - Denial of service in curl implementation for Command Line Interface, EAV Monitors, iRules components in F5 BIG-IP products

Published: February 19, 2021 Updated: October 28, 2023

Security Bulletin ID SB2021021905
CSH Severity
Low
Patch available
NO
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


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

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


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

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References