Bug 1452744 (CVE-2017-9077)

Summary: CVE-2017-9077 kernel: net: tcp_v6_syn_recv_sock function mishandles inheritance
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: aquini, bhu, dhoward, dominik.mierzejewski, fhrbata, gansalmon, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, plougher, rt-maint, rvrbovsk, slawomir, vdronov, williams, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20170510,reported=20170519,source=cve,cvss3=6.5/CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H,cwe=CWE-416,rhel-5/kernel=wontfix,rhel-6/kernel=affected,rhel-7/kernel=affected,rhel-7/kernel-rt=affected,mrg-2/realtime-kernel=affected,rhelsa-7/kernel-pegas=affected,fedora-all/kernel=affected
Fixed In Version: Doc Type: Bug Fix
Doc Text:
The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890. An unprivileged local user could use this flaw to induce kernel memory corruption on the system, leading to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-06-08 03:13:10 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On: 1450973, 1455609, 1455612, 1455614, 1455645, 1455646, 1455647, 1455648, 1455649    
Bug Blocks: 1452530    

Description Andrej Nemec 2017-05-19 14:25:39 UTC
The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890. 

Upstream patch:

https://github.com/torvalds/linux/commit/83eaddab4378db256d00d295bda6ca997cd13a52

References:

https://patchwork.ozlabs.org/patch/760370/

Comment 1 Andrej Nemec 2017-05-19 14:34:03 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1450973]

Comment 5 Vladis Dronov 2017-05-25 15:42:35 UTC
Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates of this product due to its life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2 may address this issue.

Comment 10 Fedora Update System 2017-06-01 05:10:20 UTC
kernel-4.11.3-200.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2017-06-13 19:56:45 UTC
kernel-4.11.4-100.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 12 errata-xmlrpc 2017-08-01 19:17:03 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077

Comment 13 errata-xmlrpc 2017-08-02 07:57:19 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842

Comment 14 errata-xmlrpc 2017-09-06 20:42:43 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2669 https://access.redhat.com/errata/RHSA-2017:2669

Comment 15 Justin M. Forbes 2018-01-29 18:01:04 UTC
This was fixed for Fedora with 4.12 kernel updates.

Comment 16 errata-xmlrpc 2018-06-19 04:47:36 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1854 https://access.redhat.com/errata/RHSA-2018:1854