CVE-2011-1020

Public Exploit

Description

The proc filesystem implementation in the Linux kernel 2.6.37 and earlier does not restrict access to the /proc directory tree of a process after this process performs an exec of a setuid program, which allows local users to obtain sensitive information or cause a denial of service via open, lseek, read, and write system calls.

Category

4.6
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.64%
Third-Party Advisory securityreason.com Third-Party Advisory secunia.com Third-Party Advisory openwall.com Third-Party Advisory openwall.com Third-Party Advisory seclists.org Third-Party Advisory halfdog.net Third-Party Advisory securityfocus.com Third-Party Advisory ibmcloud.com Third-Party Advisory lkml.org Third-Party Advisory lkml.org Third-Party Advisory lkml.org Third-Party Advisory lkml.org Third-Party Advisory lkml.org Third-Party Advisory lkml.org Third-Party Advisory lkml.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://exchange.xforce.ibmcloud.com/vulnerabilities/65693 third party advisory vdb entry
http://securityreason.com/securityalert/8107 third party advisory
http://secunia.com/advisories/43496 third party advisory
http://openwall.com/lists/oss-security/2011/02/24/18 third party advisory mailing list
https://lkml.org/lkml/2011/2/7/466 third party advisory mailing list
http://openwall.com/lists/oss-security/2011/02/25/2 third party advisory mailing list
https://lkml.org/lkml/2011/2/7/414 third party advisory mailing list
https://lkml.org/lkml/2011/2/10/21 third party advisory mailing list
http://www.securityfocus.com/bid/46567 third party advisory vdb entry
https://lkml.org/lkml/2011/2/7/368 mailing list third party advisory exploit
https://lkml.org/lkml/2011/2/9/417 third party advisory mailing list
https://lkml.org/lkml/2011/2/7/474 third party advisory mailing list
https://lkml.org/lkml/2011/2/7/404 third party advisory mailing list
http://seclists.org/fulldisclosure/2011/Jan/421 mailing list third party advisory exploit
http://www.halfdog.net/Security/2011/SuidBinariesAndProcInterface/ third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2011-1020?
CVE-2011-1020 has been scored as a medium severity vulnerability.
How to fix CVE-2011-1020?
To fix CVE-2011-1020, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-1020 being actively exploited in the wild?
It is possible that CVE-2011-1020 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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