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Bug 1114089 - (CVE-2014-3534) CVE-2014-3534 kernel: s390: ptrace: insufficient sanitization when setting psw mask
CVE-2014-3534 kernel: s390: ptrace: insufficient sanitization when setting ps...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20140721,repo...
: Security
Depends On: 1113673 1114090 1122612
Blocks: 1113990
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Reported: 2014-06-27 13:16 EDT by Petr Matousek
Modified: 2015-02-16 10:40 EST (History)
14 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was found that Linux kernel's ptrace subsystem did not properly sanitize the address-space-control bits when the program-status word (PSW) was being set. On IBM S/390 systems, a local, unprivileged user could use this flaw to set address-space-control bits to the kernel space, and thus gain read and write access to kernel memory.
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Clone Of:
Environment:
Last Closed: 2014-08-06 13:37:59 EDT
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Regression: ---
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CRM:
Verified Versions:
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oVirt Team: ---
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-2014:1023 normal SHIPPED_LIVE Important: kernel security and bug fix update 2014-08-06 17:10:29 EDT

  None (edit)
Description Petr Matousek 2014-06-27 13:16:40 EDT 
It was found that Linux kernel's ptrace subsystem did not properly
sanitize psw mask value. On s390 systems, an unprivileged local user
could use this flaw to set address space control bits to kernel space
combination and thus gain read/write access to kernel memory.
Comment 2 Petr Matousek 2014-06-27 13:23:56 EDT 
Statement:

This issue did not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.
Comment 4 Petr Matousek 2014-07-23 11:36:03 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1122612]
Comment 5 Martin Prpič 2014-07-24 05:25:14 EDT 
Acknowledgments:

Red Hat would like to thank Martin Schwidefsky of IBM for reporting this issue.
Comment 6 Fedora Update System 2014-08-01 02:02:45 EDT 
kernel-3.15.7-200.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 7 Martin Prpič 2014-08-05 08:07:36 EDT 
IssueDescription:

It was found that Linux kernel's ptrace subsystem did not properly sanitize the address-space-control bits when the program-status word (PSW) was being set. On IBM S/390 systems, a local, unprivileged user could use this flaw to set address-space-control bits to the kernel space, and thus gain read and write access to kernel memory.
Comment 8 errata-xmlrpc 2014-08-06 13:12:09 EDT 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1023 https://rhn.redhat.com/errata/RHSA-2014-1023.html
Comment 9 Fedora Update System 2014-08-08 04:41:52 EDT 
kernel-3.14.15-100.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
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