SB2017083105 - Multiple vulnerability in Ruby RubyGems
Published: August 31, 2017
Security Bulletin ID
SB2017083105
Severity
Medium
Patch available
YES
Number of vulnerabilities
4
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Denial of service (CVE-ID: CVE-2017-0900)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists due to insufficient validation of user-supplied input. A local attacker can supply a specially crafted 'query' command and cause the service to crash.
Successful exploitation of the vulnerability results in denial of service.
2) Security restrictions bypass (CVE-ID: CVE-2017-0899)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.The weakness exists due to unknown error. A remote attacker can escape ANSI.
3) Improper input validation (CVE-ID: CVE-2017-0901)
The vulnerability allows a remote attacker to overwrite arbitrary files on the target system.The weakness exists due to insufficient validation of user-supplied input. A remote attacker can trick the victim into installing a specially crafted RubyGem and overwrite arbitrary files.
4) Session hijacking (CVE-ID: CVE-2017-0902)
The vulnerability allows a remote attacker to hijack the target user's session.The weakness exists due to improper access control. A remote attacker can hijack DNS sessions.
Remediation
Install update from vendor's website.