CVE-2013-4851
First published: Sun Jul 28 2013(Updated: )
The vfs_hang_addrlist function in sys/kern/vfs_export.c in the NFS server implementation in the kernel in FreeBSD 8.3 and 9.x through 9.1-RELEASE-p5 controls authorization for host/subnet export entries on the basis of group information sent by the client, which allows remote attackers to bypass file permissions on NFS filesystems via crafted requests.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD Kernel | =8.3 | |
| FreeBSD Kernel | =9.0 | |
| FreeBSD Kernel | =9.1 | |
| FreeBSD Kernel | =9.1-p4 | |
| FreeBSD Kernel | =9.1-p5 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2013-4851?
CVE-2013-4851 has a moderate severity rating due to the potential for unauthorized access to files based on group information.
How do I fix CVE-2013-4851?
To fix CVE-2013-4851, upgrade to FreeBSD versions 9.1-RELEASE-p6 or later and apply any relevant patches.
What systems are affected by CVE-2013-4851?
CVE-2013-4851 affects FreeBSD versions 8.3, 9.0, and 9.1 through 9.1-RELEASE-p5.
Who can exploit CVE-2013-4851?
Remote attackers can exploit CVE-2013-4851 to bypass file system export restrictions.
What component is vulnerable in CVE-2013-4851?
The vulnerability exists in the NFS server implementation within the vfs_hang_addrlist function in the FreeBSD kernel.
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- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
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- agent/weakness
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- vendor/freebsd
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- version/freebsd kernel/8.3
- version/freebsd kernel/9.0
- version/freebsd kernel/9.1
- version/freebsd kernel/9.1-p4
- version/freebsd kernel/9.1-p5