Vulnerability Details : CVE-2014-9715
include/net/netfilter/nf_conntrack_extend.h in the netfilter subsystem in the Linux kernel before 3.14.5 uses an insufficiently large data type for certain extension data, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via outbound network traffic that triggers extension loading, as demonstrated by configuring a PPTP tunnel in a NAT environment.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2014-9715
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2014-9715
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2014-9715
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST |
References for CVE-2014-9715
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http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.5
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https://bugzilla.redhat.com/show_bug.cgi?id=1208684
1208684 – (CVE-2014-9715) CVE-2014-9715 kernel: netfilter connection tracking extensions denial of service
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http://www.securitytracker.com/id/1032415
Linux Kernel Netfilter Connection Tracking Accounting Bug Lets Local Users Deny Service - SecurityTracker
-
http://www.securityfocus.com/bid/73953
Linux Kernel 'nf_conntrack_extend.h' NULL Pointer Dereference Denial of Service Vulnerability
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http://www.debian.org/security/2015/dsa-3237
Debian -- Security Information -- DSA-3237-1 linux
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http://marc.info/?l=netfilter-devel&m=140112364215200&w=2
'OOPS NULL pointer dereference in nf_nat_setup_info+0x471 (reproductible, 3.14.4)' - MARC
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http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
Oracle Linux Bulletin - January 2016
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http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=223b02d923ecd7c84cf9780bb3686f455d279279
kernel/git/torvalds/linux.git - Linux kernel source tree
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http://www.openwall.com/lists/oss-security/2015/04/08/1
oss-security - CVE request netfilter connection tracking accounting.
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http://rhn.redhat.com/errata/RHSA-2015-1564.html
RHSA-2015:1564 - Security Advisory - Red Hat Customer Portal
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https://github.com/torvalds/linux/commit/223b02d923ecd7c84cf9780bb3686f455d279279
netfilter: nf_conntrack: reserve two bytes for nf_ct_ext->len · torvalds/linux@223b02d · GitHub
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http://rhn.redhat.com/errata/RHSA-2015-1534.html
RHSA-2015:1534 - Security Advisory - Red Hat Customer Portal
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