REDHAT-BUG-716825: Infoleak
First published: Mon Jun 27 2011(Updated: )
/proc/PID/io may be used for gathering private information. E.g. for openssh and vsftpd daemons wchars/rchars may be used to learn the precise password length. [0/2] restrict statistics information to user <a href="https://lkml.org/lkml/2011/6/24/88">https://lkml.org/lkml/2011/6/24/88</a> [1/2] proc: restrict access to /proc/PID/io (<a href="https://access.redhat.com/security/cve/CVE-2011-2495">CVE-2011-2495</a>) <a href="https://patchwork.kernel.org/patch/916032/">https://patchwork.kernel.org/patch/916032/</a> [2/2] taskstats: restrict access to user (<a href="https://access.redhat.com/security/cve/CVE-2011-2494">CVE-2011-2494</a>) <a href="https://patchwork.kernel.org/patch/916042/">https://patchwork.kernel.org/patch/916042/</a> taskstats authorized_keys presence infoleak PoC <a href="http://seclists.org/oss-sec/2011/q2/659">http://seclists.org/oss-sec/2011/q2/659</a> Acknowledgements: Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenSSH | ||
| vsftpd |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://lkml.org/lkml/2011/6/24/88
- https://access.redhat.com/security/cve/CVE-2011-2495
- https://patchwork.kernel.org/patch/916032/
- https://access.redhat.com/security/cve/CVE-2011-2494
- https://patchwork.kernel.org/patch/916042/
- http://seclists.org/oss-sec/2011/q2/659
- http://article.gmane.org/gmane.comp.security.oss.general/5337
- https://rhn.redhat.com/errata/RHSA-2011-1212.html
- https://rhn.redhat.com/errata/RHSA-2011-1189.html
- https://rhn.redhat.com/errata/RHSA-2011-1253.html
- https://access.redhat.com/support/policy/updates/errata/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=716825#c0
- http://git.kernel.org/linus/1d1221f375c94ef961ba8574ac4f85c8870ddd51
- http://git.kernel.org/linus/293eb1e7772b25a93647c798c7b89bf26c2da2e0
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=748666
- https://rhn.redhat.com/errata/RHSA-2011-1813.html
- https://bugzilla.redhat.com/show_bug.cgi?id=716825
Frequently Asked Questions
What is the severity of REDHAT-BUG-716825?
The vulnerability REDHAT-BUG-716825 is considered moderate as it may expose sensitive information regarding password lengths through the /proc/PID/io interface.
How do I fix REDHAT-BUG-716825?
To mitigate REDHAT-BUG-716825, restrict access to the /proc/PID/io statistics to the corresponding user or apply patches provided by your software vendor.
Which software is affected by REDHAT-BUG-716825?
The software affected by REDHAT-BUG-716825 includes OpenSSH and vsftpd.
Can REDHAT-BUG-716825 lead to further attacks?
Yes, the information exposed by REDHAT-BUG-716825 can potentially be used in targeted attacks, especially if an attacker can determine password lengths.
Is there a patch available for REDHAT-BUG-716825?
Yes, a patch is available from Red Hat to address the issues posed by REDHAT-BUG-716825.
- agent/type
- agent/first-publish-date
- agent/last-modified-date
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2011-2495
- agent/source
- agent/severity
- agent/weakness
- agent/references
- agent/description
- agent/event
- agent/softwarecombine
- agent/tags
- agent/guess-ai
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/openssh
- canonical/openssh
- vendor/vsftpd
- canonical/vsftpd