cURL CVE-2019-15601 Remote Security Bypass Vulnerability

Description

cURL is prone to a remote security-bypass vulnerability. An attacker can leverage this issue to bypass security restrictions and perform unauthorized actions. This may aid in further attacks. cURL versions prior to 7.68.0 are vulnerable.

Technologies Affected

• Haxx Curl 7.34.0
• Haxx Curl 7.35.0
• Haxx Curl 7.36.0
• Haxx Curl 7.37.1
• Haxx Curl 7.38.0
• Haxx Curl 7.39.0
• Haxx Curl 7.40.0
• Haxx Curl 7.41.0
• Haxx Curl 7.42.0
• Haxx Curl 7.42.1
• Haxx Curl 7.43.0
• Haxx Curl 7.45.0
• Haxx Curl 7.46.0
• Haxx Curl 7.47.0
• Haxx Curl 7.48.0
• Haxx Curl 7.49.0
• Haxx Curl 7.50.0
• Haxx Curl 7.50.1
• Haxx Curl 7.50.3
• Haxx Curl 7.60.0
• Haxx Curl 7.61.0
• Haxx Curl 7.61.1
• Haxx Curl 7.62.0
• Haxx Curl 7.63.0
• Haxx Curl 7.64.0
• Haxx Curl 7.65.3
• Haxx Curl 7.66.0
• Haxx Curl 7.67.0

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Run all software as a nonprivileged user with minimal access rights.
To limit the potential damage that successful exploits may achieve, run all nonadministrative software as an unprivileged user.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from a successful exploit.

Updates are available. Please see the references or vendor advisory for more information.