SB2022051112 - Multiple vulnerabilities in cURL
Published: May 11, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Cleartext transmission of sensitive information (CVE-ID: CVE-2022-30115)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to an error in HSTS implementation that can allow curl to continue using HTTP protocol instead of HTTPS if the host name in the given URL used a trailing dot while not using one when it built the HSTS cache. A remote attacker with ability to intercept traffic can obtain potentially sensitive information.
2) Incorrect Implementation of Authentication Algorithm (CVE-ID: CVE-2022-27782)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the way libcurl handles previously used connections in a connection pool for subsequent transfers. Several TLS and SSH settings were left out from the configuration match checks, resulting in erroneous matches for different resources. As a result, libcurl can send authentication string from one resource to another, exposing credentials to a third-party.
3) Infinite loop (CVE-ID: CVE-2022-27781)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop when handling requests with the CURLOPT_CERTINFO option. A remote attacker can consume all available system resources and cause denial of service conditions.
4) Input validation error (CVE-ID: CVE-2022-27780)
The vulnerability allows a remote attacker to bypass filters and checks.
The vulnerability exists due to the curl URL parser wrongly accepts percent-encoded URL separators like '/' when decoding the host name part of a URL, making it a different URL using the wrong host name when it is later retrieved. For example, the URL like http://example.com%2F10.0.0.1/, would be allowed by the parser and get transposed into http://example.com/10.0.0.1/.
A remote attacker can bypass various internal filters and checks and force the curl to connect to a wrong web application.
5) Information disclosure (CVE-ID: CVE-2022-27779)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to libcurl wrongly allows HTTP cookies to be set for Top Level Domains (TLDs) if the host name is provided with a trailing dot. As a result, an attacker can create cookie files that are later sent to a different and unrelated site or domain.
6) Improper control of a resource through its lifetime (CVE-ID: CVE-2022-27778)
The vulnerability allows a remote attacker to delete files on the system.
The vulnerability exists in the curl command line tool when --no-clobber is used together with --remove-on-error. A remote attacker can trick the victim to connect to a malicious server and force the command line tool to remove unexpected files.
Remediation
Install update from vendor's website.