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X11 libXfont CID Encoded Fonts Integer Overflows
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Secunia Advisory:
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SA21864
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Release Date:
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2006-09-13
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Popularity:
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11,553 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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Vendor Patch
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| Software: | X Window System 11 (X11) 6.x
X Window System 11 (X11) 7.x
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Some vulnerabilities have been reported in libXfont, which can be exploited by malicious, local users to gain escalated privileges.
The vulnerabilities are caused due to integer overflows within the "scan_cid()" function when handling CMAP and CIDFont data and the "CIDADM()" function when parsing AFM (Adobe Font Metric) files. These can be exploited to cause buffer overflows via specially crafted CID encoded Type1 fonts.
Successful exploitation may allow execution of arbitrary code with escalated privileges, but requires access to the "xset fp+" command or similar.
The vulnerabilities have been reported in X11 X.Org 6.7.0. through 7.1.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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