Bug 1437404 (CVE-2017-7308)
| Summary: | CVE-2017-7308 kernel: net/packet: overflow in check for priv area size | ||
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| Product: | [Other] Security Response | Reporter: | Martin Prpič <mprpic> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | aquini, bhu, chorn, dhoward, esammons, fhrbata, gansalmon, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kent, kernel-maint, kernel-mgr, khorenko, labbott, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, plougher, pmatouse, rt-maint, rvrbovsk, slawomir, vdronov, williams |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: |
It was found that the packet_set_ring() function of the Linux kernel's networking implementation did not properly validate certain block-size data. A local attacker with CAP_NET_RAW capability could use this flaw to trigger a buffer overflow resulting in a system crash or a privilege escalation.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-07-26 13:03:49 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: | 1437406, 1441171, 1441172, 1441173, 1441174, 1441176, 1441177, 1441178, 1459300, 1484946 | ||
| Bug Blocks: | 1437408 | ||
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Description
Martin Prpič
2017-03-30 09:21:59 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1437406] Statement: This issue does not affect Red Hat Enterprise Linux 5. In a default or common use of Red Hat Enterprise Linux 6 and 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 6 does not have namespaces support and Red Hat Enterprise Linux 7 does not have unprivileged user namespaces enabled by default, local unprivileged users also cannot abuse namespaces feature to grant this capability to themselves and elevate their privileges. So, this issue does not affect Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2 in the default configuration. Future updates for the respective releases will address this issue to secure non-default configurations. In the non-default configuration mentioned above only Red Hat Enterprise Linux 7 is vulnerable to a privilege escalation. Red Hat Enterprise Linux 6 is vulnerable only to a denial of service (DoS) due to a system crash, hence the impact on Red Hat Enterprise Linux 6 is rated as being Moderate. External References: https://googleprojectzero.blogspot.com/2017/05/exploiting-linux-kernel-via-packet.html This issue has been addressed in the following products: Red Hat Enterprise MRG 2 Via RHSA-2017:1297 https://access.redhat.com/errata/RHSA-2017:1297 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:1298 https://access.redhat.com/errata/RHSA-2017:1298 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:1308 https://access.redhat.com/errata/RHSA-2017:1308 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 |