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FreeBSD "sendfile" Information Disclosure Security Issue
Secunia Advisory:	SA28928	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2008-02-14
Popularity:	4,752 views

Critical:	Not critical
Impact:	Exposure of sensitive information
Where:	Local system
Solution Status:	Vendor Patch

OS:	FreeBSD 5.x FreeBSD 6.x

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2008-0777

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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