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: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | Sun Baoliang <blsun> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | 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.
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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: | |
| Embargoed: | |||
| Bug Depends On: | 1147392, 1147397, 1147856, 1147857, 1152755, 1154676, 1155724, 1155725, 1155726, 1155727 | ||
| Bug Blocks: | 1147872 | ||
Upstream commit: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9de7922bc709eee2f609cd01d98aaedc4cf5ea74 Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1155727] 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. 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. 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. 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. 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. 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 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 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 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 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 |
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.