Veracode Vulnerability DatabaseVERACODE:11797ASLR Bypass
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:N/I:P/A:N
kernel-rt is vulnerable to ASLR bypass attacks. The vulnerability exists as the vdso_addr function in arch/x86/vdso/vma.c in the Linux kernel through 3.18.2 does not properly choose memory locations for the vDSO area, which makes it easier for local users to bypass the ASLR protection mechanism by guessing a location at the end of a PMD.
References
git.kernel.org/?p=linux/kernel/git/luto/linux.git;a=commit;h=bc3b94c31d65e761ddfe150d02932c65971b74e2
git.kernel.org/?p=linux/kernel/git/tip/tip.git;a=commit;h=fbe1bf140671619508dfa575d74a185ae53c5dbb
lists.fedoraproject.org/pipermail/package-announce/2015-January/148480.html
lists.opensuse.org/opensuse-security-announce/2015-01/msg00035.html
lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
lists.opensuse.org/opensuse-security-announce/2015-04/msg00000.html
lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html
lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
rhn.redhat.com/errata/RHSA-2015-1081.html
rhn.redhat.com/errata/RHSA-2015-1778.html
rhn.redhat.com/errata/RHSA-2015-1787.html
v0ids3curity.blogspot.in/2014/12/return-to-vdso-using-elf-auxiliary.html
www.debian.org/security/2015/dsa-3170
www.mandriva.com/security/advisories?name=MDVSA-2015:058
www.openwall.com/lists/oss-security/2014/12/09/10
www.openwall.com/lists/oss-security/2015/01/09/8
www.securityfocus.com/bid/71990
www.ubuntu.com/usn/USN-2513-1
www.ubuntu.com/usn/USN-2514-1
www.ubuntu.com/usn/USN-2515-1
www.ubuntu.com/usn/USN-2516-1
www.ubuntu.com/usn/USN-2517-1
www.ubuntu.com/usn/USN-2518-1
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=1245345
rhn.redhat.com/errata/RHSA-2015-1787.html
Related
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:N/I:P/A:N