Information disclosure in Linux kernel

1) Information disclosure

EUVDB-ID: #VU44929

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-1170

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

net/ipv4/netfilter/arp_tables.c in the IPv4 implementation in the Linux kernel before 2.6.39 does not place the expected '' character at the end of string data in the values of certain structure members, which allows local users to obtain potentially sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability to issue a crafted request, and then reading the argument to the resulting modprobe process.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.7

External links

http://downloads.avaya.com/css/P8/documents/100145416
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=42eab94fff18cb1091d3501cd284d6bd6cc9c143
http://marc.info/?l=netfilter-devel&m=129978081009955&w=2
http://rhn.redhat.com/errata/RHSA-2011-0833.html
http://securityreason.com/securityalert/8278
http://securityreason.com/securityalert/8282
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
http://www.openwall.com/lists/oss-security/2011/03/18/15
http://www.openwall.com/lists/oss-security/2011/03/21/1
http://www.openwall.com/lists/oss-security/2011/03/21/4
http://bugzilla.redhat.com/show_bug.cgi?id=689321

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.