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FreeBSD "sendfile" Information Disclosure Security Issue
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Secunia Advisory:
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SA28928
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Release Date:
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2008-02-14
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Critical:
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Not critical
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Impact:
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Exposure of sensitive information
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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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| OS: | FreeBSD 5.x
FreeBSD 6.x
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| | CVE reference: | CVE-2008-0777 (Secunia mirror)
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Description:
A security issue has been reported in FreeBSD, which potentially can be exploited by malicious, local users to disclose sensitive information.
The problem is that the "sendfile" system call does not check the file descriptor access flags before sending data from a file. This can be exploited to e.g. open a write-only file and send the data even if a user has no read access.
Successful exploitation requires that the target file is write-only.
Solution:
Update FreeBSD or apply patches.
2008-02-14 11:45:00 UTC (RELENG_7, 7.0-PRERELEASE)
2008-02-14 11:45:41 UTC (RELENG_7_0, 7.0-RELEASE)
2008-02-14 11:46:08 UTC (RELENG_6, 6.3-STABLE)
2008-02-14 11:46:41 UTC (RELENG_6_3, 6.3-RELEASE-p1)
2008-02-14 11:47:06 UTC (RELENG_6_2, 6.2-RELEASE-p11)
2008-02-14 11:47:39 UTC (RELENG_6_1, 6.1-RELEASE-p23)
2008-02-14 11:49:39 UTC (RELENG_5, 5.5-STABLE)
2008-02-14 11:50:28 UTC (RELENG_5_5, 5.5-RELEASE-p19)
-- Patches --
FreeBSD 6.2, 6.3, and 7.0:
http://security.FreeBSD.org/patches/SA-08:03/sendfile.patch
http://security.FreeBSD.org/patches/SA-08:03/sendfile.patch.asc
FreeBSD 6.1:
http://security.FreeBSD.org/patches/SA-08:03/sendfile61.patch
http://security.FreeBSD.org/patches/SA-08:03/sendfile61.patch.asc
FreeBSD 5.5:
http://security.FreeBSD.org/patches/SA-08:03/sendfile55.patch
http://security.FreeBSD.org/patches/SA-08:03/sendfile55.patch.asc
Provided and/or discovered by:
Kostik Belousov
Original Advisory:
http://security.freebsd.org/advisories/FreeBSD-SA-08:03.sendfile.asc
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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