Re: Buffer Overflow in graphviz via via a crafted config6a file

                							

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<h1 class="m-title">Re: Buffer Overflow in graphviz via via a crafted config6a file</h1>
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<em>From</em>: Matthew Fernandez &lt;matthew.fernandez () gmail com&gt;


<em>Date</em>: Sat, 27 Jan 2024 10:15:40 +1100


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<pre style="margin: 0em;">

On 1/20/24 15:07, Meng Ruijie wrote:
</pre><blockquote style="border-left: #5555EE solid 0.2em; margin: 0em; padding-left: 0.85em"><pre style="margin: 0em;">[Vulnerability description]
Buffer Overflow vulnerability in graphviz v.2.43.0 allows a remote attacker to execute arbitrary code via a crafted 
config6a file.

[Vulnerability Type]
Buffer Overflow
</pre></blockquote><pre style="margin: 0em;">
More specifically, this issue is an out-of-bounds read.

</pre><blockquote style="border-left: #5555EE solid 0.2em; margin: 0em; padding-left: 0.85em"><pre style="margin: 0em;">[Vendor of Product]
graphviz

[Affected Product Code Base]
graphviz - 2.43.0
</pre></blockquote><pre style="margin: 0em;">
</pre><tt>AFAICT the issue was actually introduced in Graphviz 2.36. It was fixed 
</tt><tt>in commit a95f977f5d809915ec4b14836d2b5b7f5e74881e (essentially 
</tt><tt>reverting cf95714837f06f684929b54659523c2c9b1fc19f that introduced the 
</tt><tt>issue), but there has been no release yet since then. The next release 
</tt><tt>will be 10.0.0. So affected versions would be [2.36, 10.0.0).
</tt><pre style="margin: 0em;">
</pre><tt>To exploit this issue, you need to modify a typically-root-owned file. I 
</tt><tt>am not suggesting it is hard to exploit, but see my remarks below.
</tt><pre style="margin: 0em;">
</pre><blockquote style="border-left: #5555EE solid 0.2em; margin: 0em; padding-left: 0.85em"><pre style="margin: 0em;">[CVE Reference]
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2023-46045 to this 
vulnerability.
</pre></blockquote><pre style="margin: 0em;">
</pre><tt>Why was this issue gifted a CVE? If you want an out-of-bounds access in 
</tt><tt>Graphviz, there is much lower hanging fruit.
</tt><pre style="margin: 0em;">
</pre><tt>As Alan Coopersmith has noted in a separate thread,¹ this stream of 
</tt><tt>issues seems to have been bulk-created without much analysis. The CVE 
</tt><tt>details still appear to be RESERVED in NVD. The Graphviz maintainers do 
</tt><tt>not intend to contest this CVE, but I expect the details to be 
</tt><tt>inaccurate when released as I’ve noted above.
</tt><pre style="margin: 0em;">
¹ <a rel="nofollow" href="https://seclists.org/oss-sec/2024/q1/59">https://seclists.org/oss-sec/2024/q1/59</a>
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<h3 class="m-thread">Current thread:</h3>
<ul class="thread">
<li><a name="62" href="62">Buffer Overflow in graphviz via via a crafted config6a file</a> <em>Meng Ruijie (Jan 26)</em>
<ul>
<li><strong>Re: Buffer Overflow in graphviz via via a crafted config6a file</strong> <em>Matthew Fernandez (Jan 27)</em>
</li>
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</li>
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