SB2018022619 - Fedora 26 update for ruby
Published: February 26, 2018 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Command injection (CVE-ID: CVE-2017-17790)
The vulnerability allows a remote attacker to execute arbitrary command on the target system.The weakness exists in the lazy_initialize function due to command injection. A remote attacker can send a specially crafted request, inject and execute arbitrary commands.
2) Path traversal (CVE-ID: CVE-2018-1000073)
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.The weakness exists in the install_location function of package.rb due to path traversal when writing to a symlinked basedir outside of the root. A remote attacker can gain access to potentially sensitive information.
3) Desereliazation of untrusted data (CVE-ID: CVE-2018-1000074)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists in owner command due to desereliazation of untrusted data. A remote attacker can execute arbitrary code.
Successful exploitation of the vulnerability may result in system compromise.
4) Infinite loop (CVE-ID: CVE-2018-1000075)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in ruby gem package tar header due to infinite loop. A remote attacker can cause the service to crash.
5) Improper verification of cryptographic signature (CVE-ID: CVE-2018-1000076)
The vulnerability allows a remote attacker to write arbitrary files on the target system.The weakness exists in package.rb due to improper verification of cryptographic signature. A remote attacker can install mis-signed gem, as the tarball would contain multiple gem signatures.
6) Improper input validation (CVE-ID: CVE-2018-1000077)
The vulnerability allows a remote unauthenticated attacker to write arbitrary files on the target system.
The weakness exists due to improper URL validation of the specification homepage attribute. A remote attacker can trick the victim into installing a malicious RubyGems gem and set an invalid homepage URL.
7) Cross-site scripting (CVE-ID: CVE-2018-1000078)
The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The weakness exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
8) Path traversal (CVE-ID: CVE-2018-1000079)
The vulnerability allows a remote attacker to modify file locations on the target system.The weakness exists due to the improper handling of pathnames when the affected software installs new components. A remote attacker can persuade the victim into install a malicious RubyGems gem and use directory traversal techniques to write to arbitrary file locations.
Remediation
Install update from vendor's website.