FreshPorts - VuXML

This page displays vulnerability information about FreeBSD Ports.

The last vuln.xml file processed by FreshPorts is:

Revision:  431837
Date:      2017-01-19
Time:      04:08:50Z
Committer: jhale

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These are the vulnerabilities relating to the commit you have selected:

VuXML IDDescription
2a093853-2495-11e2-b0c7-000d601460a4ruby -- $SAFE escaping vulnerability about Exception#to_s/NameError#to_s

The official ruby site reports:

Vulnerabilities found for Exception#to_s, NameError#to_s, and name_err_mesg_to_s() which is Ruby interpreter-internal API. A malicious user code can bypass $SAFE check by utilizing one of those security holes.

Ruby's $SAFE mechanism enables untrusted user codes to run in $SAFE >= 4 mode. This is a kind of sandboxing so some operations are restricted in that mode to protect other data outside the sandbox.

The problem found was around this mechanism. Exception#to_s, NameError#to_s, and name_err_mesg_to_s() interpreter-internal API was not correctly handling the $SAFE bits so a String object which is not tainted can destructively be marked as tainted using them. By using this an untrusted code in a sandbox can modify a formerly-untainted string destructively.

Ruby 1.8 once had a similar security issue. It fixed Exception#to_s and NameError#to_s, but name_err_mesg_to_str() issue survived previous security fix

Discovery 2012-08-21
Entry 2012-11-01
gt 1.8.7,1 lt,1

gt 1.9.3,1 lt,1

3decc87d-2498-11e2-b0c7-000d601460a4ruby -- Unintentional file creation caused by inserting an illegal NUL character

The official ruby site reports:

A vulnerability was found that file creation routines can create unintended files by strategically inserting NUL(s) in file paths. This vulnerability has been reported as CVE-2012-4522.

Ruby can handle arbitrary binary patterns as Strings, including NUL chars. On the other hand OSes and other libraries tend not. They usually treat a NUL as an End of String mark. So to interface them with Ruby, NUL chars should properly be avoided.

However methods like IO#open did not check the filename passed to them, and just passed those strings to lower layer routines. This led to create unintentional files.

Discovery 2012-10-12
Entry 2012-11-01
gt 1.9.3,1 lt,1