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XFree86 CID Encoded Fonts Integer Overflows
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Secunia Advisory:
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SA21890
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Release Date:
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2006-09-13
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Popularity:
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7,766 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Unpatched
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| Software: | XFree86 4.1.x
XFree86 4.2.x
XFree86 4.3.x
XFree86 4.4.x
XFree86 4.5.x
XFree86 4.6.x
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| CVE reference: | CVE-2006-3739
CVE-2006-3740
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Description:
Some vulnerabilities have been reported in XFree86, which can be exploited by malicious, local users to gain escalated privileges.
Integer overflows exist within the "scan_cidfont()" function when handling CMap and CIDFont data, and the "CIDAFM()" function when parsing AFM (Adobe Font Metric) files. These can potentially be exploited to execute arbitrary code via specially crafted CID encoded Type1 fonts.
Successful exploitation may allow to execute arbitrary code with escalated privileges.
Solution:
Do not load the "type1" font module.
Provided and/or discovered by:
Discovered by an anonymous person and reported via iDEFENSE.
Original Advisory:
iDEFENSE:
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=411
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=412
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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