CVE-2011-1020
The MITRE CVE dictionary describes this issue as:
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.
Find out more about CVE-2011-1020 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.
This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via RHSA-2012:0007, RHSA-2011:1530 and RHSA-2011:1253 respectively.
CVSS v2 metrics
| Base Score | 3.6 |
|---|---|
| Base Metrics | AV:L/AC:L/Au:N/C:P/I:P/A:N |
| Access Vector | Local |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | None |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 5 (kernel) | RHSA-2012:0007 | 2012-01-10 |
| Red Hat Enterprise Linux Server EUS (v. 6.1) (kernel) | RHSA-2012:0116 | 2012-02-15 |
| Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) | RHSA-2011:1253 | 2011-09-12 |
| Red Hat Enterprise Linux 6 (kernel) | RHSA-2011:1530 | 2011-12-05 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise MRG 1 | realtime-kernel | Will not fix |
| Red Hat Enterprise Linux 4 | kernel | Will not fix |
Acknowledgements
Red Hat would like to thank Kees Cook for reporting this issue.CVE description copyright © 2017, The MITRE Corporation