Bug 1114089 (CVE-2014-3534) - CVE-2014-3534 kernel: s390: ptrace: insufficient sanitization when setting psw mask
Summary: CVE-2014-3534 kernel: s390: ptrace: insufficient sanitization when setting ps...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2014-3534
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: Engineering1113673 Engineering1114090 1122612
Blocks: Embargoed1113990
TreeView+ depends on / blocked
 
Reported: 2014-06-27 17:16 UTC by Petr Matousek
Modified: 2021-06-01 12:59 UTC (History)
15 users (show)

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.
Clone Of:
Environment:
Last Closed: 2014-08-06 17:37:59 UTC

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2014:1023 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2014-08-06 21:10:29 UTC

Description Petr Matousek 2014-06-27 17:16:40 UTC 
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 17:23:56 UTC 
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 3 Petr Matousek 2014-07-23 15:29:59 UTC 
Upstream patch:

  http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dab6cf55f81a6e16b8147aed9a843e1691dcd318
Comment 4 Petr Matousek 2014-07-23 15:36:03 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1122612]
Comment 6 Fedora Update System 2014-08-01 06:02:45 UTC 
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 12:07:36 UTC 
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 17:12:09 UTC 
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 08:41:52 UTC 
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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