Bug 1292045 - (CVE-2015-8569) CVE-2015-8569 kernel: Information leak from getsockname
CVE-2015-8569 kernel: Information leak from getsockname
Status: CLOSED WONTFIX
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20151214,reported=2...
: Security
Depends On: 1292047
Blocks: 1292049
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Reported: 2015-12-16 05:36 EST by Adam Mariš
Modified: 2016-05-13 06:02 EDT (History)
35 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
An out-of-bounds flaw was found in the kernel, where the length of the sockaddr parameter was not checked in the pptp_bind() and pptp_connect() functions. As a result, more kernel memory was copied out than required, leaking information from the kernel stack (including kernel addresses). A local system user could exploit this flaw to bypass kernel ASLR or leak other information.
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Last Closed: 2016-01-26 08:28:44 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2015-12-16 05:36:18 EST
It was found that there was missing the check of the length of the passed sockaddr in pptp_bind() and pptp_connect() functions, copying out more kernel memory than required, leaking information from the kernel stack, including kernel addresses. This can be used for kernel ASLR bypassing or other information leaks.

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=09ccfd238e5a0e670d8178cf50180ea81ae09ae1

Reproducer:

https://lkml.org/lkml/2015/12/14/252

CVE assignment:

http://seclists.org/oss-sec/2015/q4/510
Comment 1 Adam Mariš 2015-12-16 05:36:57 EST
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1292047]
Comment 2 Fedora Update System 2016-01-12 02:58:47 EST
kernel-4.3.3-300.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 5 Vladis Dronov 2016-01-26 08:25:46 EST
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 as the code with the flaw is not present in the products listed.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Comment 6 Fedora Update System 2016-02-01 01:23:04 EST
kernel-4.3.4-200.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

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