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Bug 1201887 - (CVE-2011-5321) CVE-2011-5321 Kernel: tty: driver reference leakage in tty_open
CVE-2011-5321 Kernel: tty: driver reference leakage in tty_open
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20111012,repor...
: Security
Depends On: 1201893 1201894
Blocks: 1067898
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Reported: 2015-03-13 13:50 EDT by Prasad J Pandit
Modified: 2018-08-28 17:58 EDT (History)
26 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A NULL pointer dereference flaw was found in the way the Linux kernel's virtual console implementation handled reference counting when accessing pseudo-terminal device files (/dev/pts/*). A local, unprivileged attacker could use this flaw to crash the system.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:1221 normal SHIPPED_LIVE Moderate: kernel security, bug fix, and enhancement update 2015-07-14 15:12:10 EDT

  None (edit)
Description Prasad J Pandit 2015-03-13 13:50:28 EDT 
Linux kernel built with the virtual console support(CONFIG_VT) is vulnerable
to a NULL pointer dereference issue. It could occur while accessing pseudo
terminal device(/dev/pts/*) files.

An unprivileged user could use this flaw to crash the system kernel resulting
in DoS.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/c290f8358acaeffd8e0c551ddcc24d1206143376
Comment 1 Prasad J Pandit 2015-03-13 14:02:45 EDT 
Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 7 and Red Hat Enterprise MRG 2.

This issue affects the version of Linux kernel as shipped with Red Hat
Enterprise Linux 6. Future kernel updates for Red Hat Enterprise Linux 6
may address this issue.
Comment 4 errata-xmlrpc 2015-07-14 11:12:39 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2015:1221 https://rhn.redhat.com/errata/RHSA-2015-1221.html
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