Permissions, Privileges, and Access Controls in Linux kernel

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU41702

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-1738

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The raw_cmd_copyout function in drivers/block/floppy.c in the Linux kernel through 3.14.3 does not properly restrict access to certain pointers during processing of an FDRAWCMD ioctl call, which allows local users to obtain sensitive information from kernel heap memory by leveraging write access to a /dev/fd device.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.0 - 3.14.2

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.9:*:*:*:*:*:*:*

External links

https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2145e15e0557a01b9195d1c7199a1b92cb9be81f
https://linux.oracle.com/errata/ELSA-2014-0771.html
https://linux.oracle.com/errata/ELSA-2014-3043.html
https://lists.opensuse.org/opensuse-security-announce/2014-05/msg00007.html
https://lists.opensuse.org/opensuse-security-announce/2014-05/msg00012.html
https://rhn.redhat.com/errata/RHSA-2014-0800.html
https://rhn.redhat.com/errata/RHSA-2014-0801.html
https://secunia.com/advisories/59262
https://secunia.com/advisories/59309
https://secunia.com/advisories/59406
https://secunia.com/advisories/59599
https://www.debian.org/security/2014/dsa-2926
https://www.debian.org/security/2014/dsa-2928
https://www.openwall.com/lists/oss-security/2014/05/09/2
https://www.securityfocus.com/bid/67302
https://www.securitytracker.com/id/1030474
https://bugzilla.redhat.com/show_bug.cgi?id=1094299
https://github.com/torvalds/linux/commit/2145e15e0557a01b9195d1c7199a1b92cb9be81f

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.