Input validation error in Linux kernel



| Updated: 2020-08-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2011-1080
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Input validation error

EUVDB-ID: #VU43951

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-1080

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The do_replace function in net/bridge/netfilter/ebtables.c in the Linux kernel before 2.6.39 does not ensure that a certain name field ends with a '' character, which allows local users to obtain potentially sensitive information from kernel stack memory by leveraging the CAP_NET_ADMIN capability to replace a table, and then reading a modprobe command line.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 2.6.38 - 2.6.38.7

CPE2.3 External links

https://downloads.avaya.com/css/P8/documents/100145416
https://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d846f71195d57b0bbb143382647c2c6638b04c5a
https://rhn.redhat.com/errata/RHSA-2011-0833.html
https://www.openwall.com/lists/oss-security/2011/03/01/10
https://bugzilla.redhat.com/show_bug.cgi?id=681262
https://github.com/torvalds/linux/commit/d846f71195d57b0bbb143382647c2c6638b04c5a


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.



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