RubyGems Gem::CommandManager#run Escape Sequence Injection Vulnerability [CVE-2019-8325]
CVE Number – CVE-2019-8325
A vulnerability in RubyGems could allow an unauthenticated, remote attacker to inject escape sequence code on a targeted system.The vulnerability exists because the Gem::CommandManager#run command of the affected software calls the alert_error function without escaping. An attacker could exploit this vulnerability by submitting a crafted response to the targeted system. A successful exploit could cause an escape sequence injection condition on the targeted system.RubyGems confirmed the vulnerability and released software updates.
Analysis
- To exploit this vulnerability, the attacker must send a crafted response to the targeted system, making exploitation more difficult in environments that restrict network access from untrusted sources.
Safeguards
- Administrators are advised to apply the appropriate updates.Administrators are advised to allow only trusted users to have network access.Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.Administrators can help protect affected systems from external attacks by using a solid firewall strategy.Administrators are advised to monitor affected systems.
Vendor Announcements
- RubyGems has released a security advisory at the following link: CVE-2019-8325: Escape sequence injection vulnerability in errors
Fixed Software
- RubyGems has released software updates at the following link: RubyGems Releases
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.