The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade RHEL:6 nfs-utils to version 1:1.2.3-15.el6 or higher.
This issue was patched in RHSA-2011:1534.
Note: Versions mentioned in the description apply only to the upstream nfs-utils package and not the nfs-utils package as distributed by RHEL.
See How to fix? for RHEL:6 relevant fixed versions and status.
The host_reliable_addrinfo function in support/export/hostname.c in nfs-utils before 1.2.4 does not properly use DNS to verify access to NFS exports, which allows remote attackers to mount filesystems by establishing crafted DNS A and PTR records.