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FreeBSD procfs/linprocfs Process Argument Vector Handling Vulnerability
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Secunia Advisory:
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SA13352
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Release Date:
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2004-12-02
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Critical:
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Less critical
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Impact:
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Exposure of system information
Exposure of sensitive information
DoS
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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 4.x
FreeBSD 5.x
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| | CVE reference: | CVE-2004-1066 (Secunia mirror)
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Description:
A vulnerability has been reported in FreeBSD, which can be exploited by malicious, local users to gain knowledge of sensitive information or cause a DoS (Denial of Service).
The vulnerability is caused due to an error in "/proc/curproc/cmdline" of the procfs file system and "/proc/self/cmdline" of the linprocfs file system when reading an argument vector from a process address space. This can be exploited to disclose parts of kernel memory or crash a vulnerable system.
Successful exploitation requires that the procfs or linprocfs file system is mounted.
NOTE: "/proc/self/cmdline" is not implemented in FreeBSD 4.x.
Solution:
Update to a fixed version or apply patches.
The vulnerability has been fixed in the following versions:
* 2004-12-01 21:33:35 UTC (RELENG_5, 5.3-STABLE)
* 2004-12-01 21:34:23 UTC (RELENG_5_3, 5.3-RELEASE-p2)
* 2004-12-01 21:34:43 UTC (RELENG_5_2, 5.2.1-RELEASE-p13)
* 2004-12-01 21:33:57 UTC (RELENG_4, 4.10-STABLE)
* 2004-12-01 21:35:10 UTC (RELENG_4_10, 4.10-RELEASE-p5)
* 2004-12-01 21:35:57 UTC (RELENG_4_8, 4.8-RELEASE-p27)
Patch for FreeBSD 4.8 and 4.10:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:17/procfs4.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:17/procfs4.patch.asc
Patch for FreeBSD 5.2 and 5.3:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:17/procfs5.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:17/procfs5.patch.asc
Provided and/or discovered by:
Bryan Fulton and Ted Unangst.
Original Advisory:
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-04%3A17.procfs.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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