Bug 1759681 (CVE-2019-16994) - CVE-2019-16994 kernel: Memory leak in sit_init_net() in net/ipv6/sit.c
Summary: CVE-2019-16994 kernel: Memory leak in sit_init_net() in net/ipv6/sit.c
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-16994
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1759682 1830011 1830012 1830013
Blocks: 1759683
TreeView+ depends on / blocked
 
Reported: 2019-10-08 20:18 UTC by Pedro Sampaio
Modified: 2023-12-15 16:49 UTC (History)
44 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way the sit_init_net function in the Linux kernel handled resource cleanup on errors. This flaw allows an attacker to use the error conditions to crash the system.
Clone Of:
Environment:
Last Closed: 2020-09-29 21:58:29 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2020:4416 0 None None None 2020-10-29 15:09:23 UTC
Red Hat Product Errata RHBA-2020:4417 0 None None None 2020-10-29 15:07:49 UTC
Red Hat Product Errata RHBA-2020:4418 0 None None None 2020-10-29 15:13:10 UTC
Red Hat Product Errata RHBA-2020:4419 0 None None None 2020-10-29 15:12:03 UTC
Red Hat Product Errata RHBA-2020:4420 0 None None None 2020-10-29 15:50:47 UTC
Red Hat Product Errata RHSA-2020:4060 0 None None None 2020-09-29 20:51:35 UTC
Red Hat Product Errata RHSA-2020:4062 0 None None None 2020-09-29 18:58:00 UTC

Description Pedro Sampaio 2019-10-08 20:18:31 UTC 
In the Linux kernel before 5.0, a memory leak exists in sit_init_net() in net/ipv6/sit.c when register_netdev() fails to register sitn->fb_tunnel_dev, which may cause denial of service.

Upstream patch:

https://github.com/torvalds/linux/commit/07f12b26e21ab359261bf75cfcb424fdc7daeb6d
Comment 1 Pedro Sampaio 2019-10-08 20:19:18 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1759682]
Comment 2 Justin M. Forbes 2019-10-09 14:51:05 UTC 
This was fixed for Fedora with the 5.0 stable reebases.
Comment 6 Petr Matousek 2020-04-30 17:20:47 UTC 
Statement:

This issue is rated as having Low impact because of the preconditions needed to trigger the error/resource cleanup code path (system-wide out-of-memory condition, high privileges or physical access).
Comment 7 Petr Matousek 2020-04-30 17:20:51 UTC 
Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Comment 10 errata-xmlrpc 2020-09-29 18:57:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4062 https://access.redhat.com/errata/RHSA-2020:4062
Comment 11 errata-xmlrpc 2020-09-29 20:51:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4060 https://access.redhat.com/errata/RHSA-2020:4060
Comment 12 Product Security DevOps Team 2020-09-29 21:58:29 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-16994
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