Bug 1480266 (CVE-2017-7558) - CVE-2017-7558 kernel: Out of bounds read in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() in SCTP stack
Summary: CVE-2017-7558 kernel: Out of bounds read in inet_diag_msg_sctp{,l}addr_fill()...
Status: NEW
Alias: CVE-2017-7558
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20170823,repor...
Keywords: Security
Depends On: 1484351 1484354 1484355 1484356 1484357 1484358 1484810
Blocks: 1480268
TreeView+ depends on / blocked
 
Reported: 2017-08-10 14:32 UTC by Pedro Sampaio
Modified: 2019-02-08 15:02 UTC (History)
48 users (show)

(edit)
A kernel data leak due to an out-of-bound read was found in the Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through version 4.13. A data leak happens when these functions fill in sockaddr data structures used to export socket's diagnostic information. As a result, up to 100 bytes of the slab data could be leaked to a userspace.
Clone Of:
(edit)
Last Closed:


Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2017:3163 normal SHIPPED_LIVE new packages: kernel-alt 2017-11-09 14:59:25 UTC
Red Hat Product Errata RHSA-2017:2918 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-10-19 17:24:24 UTC
Red Hat Product Errata RHSA-2017:2930 normal SHIPPED_LIVE Important: kernel security and bug fix update 2017-10-19 18:47:35 UTC
Red Hat Product Errata RHSA-2017:2931 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-10-19 18:48:35 UTC

Description Pedro Sampaio 2017-08-10 14:32:43 UTC
A kernel data leak due to an out-of-bound read was found in Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since v4.7-rc1 upto v4.13 including. A data leak happens when these functions fill in sockaddr data structures used to export socket's diagnostic information. As a result upto 100 bytes of the slab data could be leaked to a userspace.

References:

http://seclists.org/oss-sec/2017/q3/338

https://marc.info/?t=150348787500002&r=1&w=2

Proposed upstream patch:

https://marc.info/?l=linux-netdev&m=150348777122761&w=2

Comment 1 Pedro Sampaio 2017-08-10 14:32:55 UTC
Acknowledgments:

Name: Stefano Brivio (Red Hat)

Comment 6 Vladis Dronov 2017-08-23 12:54:40 UTC
Statement:

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

This issue affects Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future updates for the respective releases may address this issue.

Comment 7 Vladis Dronov 2017-08-24 10:46:46 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1484810]

Comment 10 errata-xmlrpc 2017-10-19 13:27:33 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2918 https://access.redhat.com/errata/RHSA-2017:2918

Comment 11 errata-xmlrpc 2017-10-19 15:07:13 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2930 https://access.redhat.com/errata/RHSA-2017:2930

Comment 12 errata-xmlrpc 2017-10-19 15:10:53 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2931 https://access.redhat.com/errata/RHSA-2017:2931


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