Vulnerability identifier: #VU44877
Vulnerability 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:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The do_task_stat function in fs/proc/array.c in the Linux kernel before 2.6.39-rc1 does not perform an expected uid check, which makes it easier for local users to defeat the ASLR protection mechanism by reading the start_code and end_code fields in the /proc/#####/stat file for a process executing a PIE binary.
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=5883f57ca0008ffc93e09cbb9847a1928e50c6f3
http://rhn.redhat.com/errata/RHSA-2011-0833.html
http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.39/ChangeLog-2.6.39-rc1
http://www.securityfocus.com/bid/47791
http://www.spinics.net/lists/mm-commits/msg82726.html
http://bugzilla.redhat.com/show_bug.cgi?id=684569
http://lkml.org/lkml/2011/3/11/380
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.