Permissions, Privileges, and Access Controls in Linux kernel - CVE-2014-7826
Published: November 10, 2014 / Updated: August 10, 2020
Vulnerability identifier: #VU41136
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2014-7826
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
kernel/trace/trace_syscalls.c in the Linux kernel through 3.17.2 does not properly handle private syscall numbers during use of the ftrace subsystem, which allows local users to gain privileges or cause a denial of service (invalid pointer dereference) via a crafted application.
How to mitigate CVE-2014-7826
Install update from vendor's website.
Sources
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=086ba77a6db00ed858ff07451bedee197df868c9
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
- http://rhn.redhat.com/errata/RHSA-2014-1943.html
- http://rhn.redhat.com/errata/RHSA-2015-0290.html
- http://rhn.redhat.com/errata/RHSA-2015-0864.html
- http://www.openwall.com/lists/oss-security/2014/11/06/11
- http://www.securityfocus.com/bid/70971
- https://bugzilla.redhat.com/show_bug.cgi?id=1161565
- https://exchange.xforce.ibmcloud.com/vulnerabilities/98556
- https://github.com/torvalds/linux/commit/086ba77a6db00ed858ff07451bedee197df868c9