Bug 1400019 (CVE-2016-8655)
| Summary: | CVE-2016-8655 kernel: Race condition in packet_set_ring leads to use after free | ||
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| Product: | [Other] Security Response | Reporter: | Adam Mariš <amaris> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | agordeev, aquini, bhu, chref, dafox7777777, dhoward, ealcaniz, esammons, fhrbata, hannsj_uhl, iboverma, jhan, jkacur, joelsmith, jross, kabbott, kernel-mgr, lgoncalv, lwang, martin, matt, mcressma, menthos, mguzik, mjc, nmurray, pasteur, pholasek, plougher, pmatouse, rvrbovsk, sander.van.dinten, sardella, security-response-team, slawomir, williams, yozone |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets implementation in the Linux kernel networking subsystem handled synchronization while creating the TPACKET_V3 ring buffer. A local user able to open a raw packet socket (requires the CAP_NET_RAW capability) could use this flaw to elevate their privileges on the system.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-09-05 05:04:33 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: | 1401820, 1401852, 1401853, 1401854, 1401855, 1401856, 1401857 | ||
| Bug Blocks: | 1400022 | ||
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Description
Adam Mariš
2016-11-30 10:02:22 UTC
Acknowledgments: Name: Philip Pettersson Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1401820] Public via: http://seclists.org/oss-sec/2016/q4/607 Upstream patch: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=84ac7260236a49c79eede91617700174c2c19b0c Statement: This issue does not affect Red Hat Enterprise Linux 5 and 6. This issue does affect Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future updates for the respective releases will address this issue. In a default or common use of Red Hat Enterprise Linux 7 this issue does not allow an unprivileged local user elevate their privileges on the system. In order to exploit this issue the attacker needs CAP_NET_RAW capability, which needs to be granted by the administrator to the attacker's account. Since Red Hat Enterprise Linux 7 does not have unprivileged user namespaces enabled by default, local unprivileged users also cannot abuse namespaces to grant this capability to themselves and elevate their privileges. bump This issue has been addressed in the following products: Red Hat Enterprise MRG 2 Via RHSA-2017:0402 https://rhn.redhat.com/errata/RHSA-2017-0402.html This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:0386 https://rhn.redhat.com/errata/RHSA-2017-0386.html This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:0387 https://rhn.redhat.com/errata/RHSA-2017-0387.html |