Bug 1147850 (CVE-2014-3673)

Summary: CVE-2014-3673 kernel: sctp: skb_over_panic when receiving malformed ASCONF chunks
Product: [Other] Security Response Reporter: Petr Matousek <pmatouse>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact: Sun Baoliang <blsun>
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: agordeev, aquini, bhu, blsun, chazlett, dborkmann, dhoward, esammons, fhrbata, iboverma, jkacur, jross, kernel-mgr, kzhang, lgoncalv, lwang, matt, mcressma, mguzik, nmurray, pholasek, plougher, rvrbovsk, security-response-team, vdronov, weliu, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
A flaw was found in the way the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation handled malformed Address Configuration Change Chunks (ASCONF). A remote attacker could use either of these flaws to crash the system.
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-01-14 00:12:39 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1147392, 1147397, 1147856, 1147857, 1152755, 1154676, 1155724, 1155725, 1155726, 1155727    
Bug Blocks: 1147872    

Description Petr Matousek 2014-09-30 08:20:57 UTC
Kernel panic (via skb_over_panic) is encountered when sctp stack receive a malformed asconf chunks.

    skb_over_panic: text:ffffffffa01ea1c3 len:31056 put:30768
     head:ffff88011bd81800 data:ffff88011bd81800 tail:0x7950
     end:0x440 dev:<NULL>
     ------------[ cut here ]------------
    kernel BUG at net/core/skbuff.c:129!
    [...]
    Call Trace:
     <IRQ>
     [<ffffffff8144fb1c>] skb_put+0x5c/0x70
     [<ffffffffa01ea1c3>] sctp_addto_chunk+0x63/0xd0 [sctp]
     [<ffffffffa01eadaf>] sctp_process_asconf+0x1af/0x540 [sctp]
     [<ffffffff8152d025>] ? _read_unlock_bh+0x15/0x20
     [<ffffffffa01e0038>] sctp_sf_do_asconf+0x168/0x240 [sctp]
     ...

A remote attacker could use this flaw to crash the system.

Acknowledgements:

This issue was discovered by Liu Wei of Red Hat.

Comment 5 Petr Matousek 2014-10-22 17:42:17 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1155727]

Comment 6 Petr Matousek 2014-10-22 18:16:21 UTC
Statement:

This issue does affect Red Hat Enterprise Linux 5. This has been rated as having Important 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/.

This issue does affect Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG. Future Linux kernel updates for the respective releases will address this issue.

Comment 7 Fedora Update System 2014-10-28 06:43:08 UTC
kernel-3.16.6-202.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2014-11-03 05:23:06 UTC
kernel-3.17.2-300.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2014-11-16 14:46:42 UTC
kernel-3.14.23-100.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 10 Martin Prpič 2014-12-05 14:27:27 UTC
IssueDescription:

A flaw was found in the way the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation handled malformed Address Configuration Change Chunks (ASCONF). A remote attacker could use either of these flaws to crash the system.

Comment 11 errata-xmlrpc 2014-12-09 20:36:31 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1971 https://rhn.redhat.com/errata/RHSA-2014-1971.html

Comment 12 errata-xmlrpc 2014-12-16 19:13:29 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1997 https://rhn.redhat.com/errata/RHSA-2014-1997.html

Comment 13 errata-xmlrpc 2015-01-13 18:28:14 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.4 EUS - Server and Compute Node Only

Via RHSA-2015:0043 https://rhn.redhat.com/errata/RHSA-2015-0043.html

Comment 14 errata-xmlrpc 2015-01-20 17:23:18 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 EUS - Server and Compute Node Only

Via RHSA-2015:0062 https://rhn.redhat.com/errata/RHSA-2015-0062.html

Comment 15 errata-xmlrpc 2015-02-03 17:12:17 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.2 AUS

Via RHSA-2015:0115 https://rhn.redhat.com/errata/RHSA-2015-0115.html