Red Hat Bugzilla – Bug 415591
CVE-2007-6278 FLAC doesn't enforce a MIME type for image referenced by URL
Last modified: 2007-12-07 10:02:54 EST
Common Vulnerabilities and Exposures assigned an identifier CVE-2007-6278 to the following vulnerability:
Free Lossless Audio Codec (FLAC) libFLAC before 1.2.1 allows user-assisted remote attackers to force a client to download arbitrary files via the MIME-Type URL flag (-->) for the FLAC image file in a crafted .FLAC file.
Vulnerability #11: Malformed Image/File Download Vulnerability
Using the "-->" MIME-Type flag to signal a URL for a FLAC image file
could allow the possibility of arbitrary file downloads if the
application does not verify the file-type prior to downloading the file.
This could also be combined with GDI+ or other picture rendering
vulnerabilities to allow code execution depending on the application.
This could also be applied to image files inserted into the FLAC file.
Alternatively, this might be a vector to store malicious data, such as
an attacker's payload. This could then be combined with another
vulnerability to allow a more reliable exploit especially if the data
retrieved by the vulnerable application is stored in a reliable memory
This is completely bogus. If we have a compromised FLAC, it could contain a link
to a compromised server (ie. with a completely bogus mime-type).
There would be no way to check the data beforehand. This problem lies solely
with the applications and their respective image libraries.
Red Hat does not consider this a security issue. Downloading and opening a file
of unknown type from potentially untrusted location does not impose any security
risks and it's normally done by other applications such as web browsers and