Vulnerability Details : CVE-2013-4851
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.
Exploit prediction scoring system (EPSS) score for CVE-2013-4851
Probability of exploitation activity in the next 30 days: 0.70%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 78 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2013-4851
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
6.4
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:P/A:N |
10.0
|
4.9
|
NIST |
CWE ids for CVE-2013-4851
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Assigned by: nvd@nist.gov (Primary)
References for CVE-2013-4851
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http://www.securityfocus.com/bid/61484
FreeBSD 'nfsserver' Module CVE-2013-4851 Access Bypass Vulnerability
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http://svnweb.freebsd.org/base?view=revision&revision=244226
[base] Revision 244226
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http://www.freebsd.org/security/advisories/FreeBSD-SA-13:08.nfsserver.asc
Products affected by CVE-2013-4851
- cpe:2.3:o:freebsd:freebsd:8.3:*:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:9.1:*:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:9.1:p4:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:9.1:p5:*:*:*:*:*:*