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XScreenSaver "getpwuid()" Authentication Bypass Weakness
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Secunia Advisory:
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SA25065
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Release Date:
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2007-05-03
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Popularity:
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4,361 views
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Critical:
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Not critical
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Impact:
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Security Bypass
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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: | XScreenSaver 4.x
XScreenSaver 5.x
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| CVE reference: | CVE-2007-1859
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Description:
Alex Yamauchi has reported a weakness in XScreenSaver, which potentially can be exploited by malicious people to bypass certain security restrictions.
The weakness is caused due to an error within the parsing of results of a call to "getpwuid()" in drivers/lock.c when using directory servers during a network outage. This can be exploited to e.g. crash XScreenSaver and thus gain access to a locked system.
Solution:
Update to version 5.02.
Provided and/or discovered by:
Alex Yamauchi
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About this Secunia Advisory
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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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