SB2020070104 - Red Hat Enterprise Linux 7 update for ruby
Published: July 1, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Security restrictions bypass (CVE-ID: CVE-2018-16396)
The vulnerability allows a remote attacker to bypass security restrictions on the target system.The weakness exists due to the tainted flags are not propagated with the
B, b, H, and h directives. A remote attacker can supply inputs by Array#pack and/or String#unpack with these directives and checks the reliability with tainted flags and cause the check to be wrong to bypass security restrictions and conduct further attacks.2) Cross-site scripting (CVE-ID: CVE-2019-8321)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in Gem::UserInteraction#verbose. 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.
3) Cross-site scripting (CVE-ID: CVE-2019-8322)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data when displaying contents of the API response directly to stdout. 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.
4) Cross-site scripting (CVE-ID: CVE-2019-8323)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in Gem::GemcutterUtilities#with_response when displaying data in the API. 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.
5) Code Injection (CVE-ID: CVE-2019-8324)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation when processing multiple line entries within gems in ensure_loadable_spec(). A remote attacker can send a specially crafted gem, inject malicious code into stub line of gemspec and execute it code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
6) Cross-site scripting (CVE-ID: CVE-2019-8325)
The vulnerability allows a remote attacker to perform XSS attacks.
The vulnerability exists due to improper input validation when processing alerts in the Gem::CommandManager#run. A remote attacker can inject and execute arbitrary HTML or JavaScript code.
Remediation
Install update from vendor's website.