SB2018011015 - Ubuntu update for Ruby
Published: January 10, 2018
Security Bulletin ID
SB2018011015
Severity
Low
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) Information disclosure (CVE-ID: CVE-2017-10784)
The vulnerability allows a remote attacker to cause DoS condition or obtain potentially sensitive information on the target system.The weakness exists due to escape sequence injection vulnerability in the Basic authentication of WEBrick. A remote attacker can supply a specially crafted user name value to the WEBrick Basic authentication function, inject escape sequence into the log file and view log contents.
Successful exploitation of the vulnerability results in information disclosure or denial of service.
2) Improper input validation (CVE-ID: CVE-2017-14033)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to buffer underrun. A remote attacker can provide a specially crafted string to the OpenSSL::ASN1 decode function to cause the target interpreter to crash.
Successful exploitation of the vulnerability results in denial of service.
3) Information disclosure (CVE-ID: CVE-2017-14064)
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.The weakness exists due to an issue with using strdup in ext/json/ext/generator/generator.c during a JSON generate call. A remote attacker can send a specially crafted request, stop strdup after encountering a '' byte, returning a pointer to a string of length zero, which is not the length stored in space_len and expose arbitrary memory.
Successful exploitation of the vulnerability results in information disclosure.
4) 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.
Remediation
Install update from vendor's website.