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Ruby Multiple Vulnerabilities
Secunia Advisory: SA31430
Release Date: 2008-08-11
Last Update: 2008-09-11
Popularity: 3,347 views

Critical:
Moderately critical
Impact: Security Bypass
Spoofing
DoS
Where: From remote
Solution Status: Vendor Patch

Software:Ruby 1.8.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
Some vulnerabilities have been reported in Ruby, which can be exploited by malicious people to bypass certain security restrictions, cause a DoS (Denial of Service), and conduct spoofing attacks.

1) Multiple errors in the implementation of safe level restrictions can be exploited to call "untrace_var()", perform syslog operations, and modify "$PROGRAM_NAME" at safe level 4, or call insecure methods at safe levels 1 through 3.

2) An error exists in the usage of regular expressions in "WEBrick::HTTPUtils.split_header_value()". This can be exploited to consume large amounts of CPU via a specially crafted HTTP request.

3) An error in "DL" can be exploited to bypass security restrictions and call potentially dangerous functions.

4) The vulnerability is caused due to resolv.rb not sufficiently randomising the DNS query port number, which can be exploited to poison the DNS cache.

The vulnerabilities are reported in the following versions:
* 1.8.5 and prior
* 1.8.6-p286 and prior
* 1.8.7-p71 and prior

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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