CVE-2014-1738

Impact:
Important
Public Date:
2014-05-07
Bugzilla:
1094299: CVE-2014-1737 CVE-2014-1738 kernel: block: floppy: privilege escalation via FDRAWCMD floppy ioctl command
A flaw was found in the way the Linux kernel's floppy driver handled user space provided data in certain error code paths while processing FDRAWCMD IOCTL commands. A local user with write access to /dev/fdX could use this flaw to free (using the kfree() function) arbitrary kernel memory. (CVE-2014-1737, Important) It was found that the Linux kernel's floppy driver leaked internal kernel memory addresses to user space during the processing of the FDRAWCMD IOCTL command. A local user with write access to /dev/fdX could use this flaw to obtain information about the kernel heap arrangement. (CVE-2014-1738, Low) Note: A local user with write access to /dev/fdX could use these two flaws (CVE-2014-1737 in combination with CVE-2014-1738) to escalate their privileges on the system.

Find out more about CVE-2014-1738 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

Base Score 6.6
Base Metrics AV:L/AC:M/Au:S/C:C/I:C/A:C
Access Vector Local
Access Complexity Medium
Authentication Single
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (kernel) RHSA-2014:0771 2014-06-19
Red Hat Enterprise Linux Long Life (v. 5.6 server) (kernel) RHSA-2014:0801 2014-06-26
Red Hat Enterprise Linux 7 (kernel) RHSA-2014:0786 2014-06-24
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2014:0557 2014-05-27
Red Hat Enterprise Linux Extended Update Support 6.4 (kernel) RHSA-2014:0900 2014-07-17
Red Hat Enterprise Linux EUS (v. 5.9 server) (kernel) RHSA-2014:0772 2014-06-19
Red Hat Enterprise Linux Advanced Update Support 6.2 (kernel) RHSA-2014:0800 2014-06-26
Red Hat Enterprise Linux 5 (kernel) RHSA-2014:0740 2014-06-10

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Affected

Acknowledgements

Red Hat would like to thank Matthew Daley for reporting these issues.

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