Bug 1758248 (CVE-2019-17055)
| Summary: | CVE-2019-17055 kernel: unprivileged users able to create RAW sockets in AF_ISDN network protocol | ||
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| Product: | [Other] Security Response | Reporter: | Dhananjay Arunesh <darunesh> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | acaringi, aclaudi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, steved, williams, wmealing |
| 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 vulnerability was found in the Linux kernel’s implementation of the AF_ISDN protocol, which does not enforce the CAP_NET_RAW capability. This flaw can allow unprivileged users to create a raw socket for this protocol. This could further allow the user to control the availability of an existing ISDN circuit.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-03-11 22:31:42 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: | 1758249, 1772779, 1778625, 1779473, 1779474, 1779475, 1779476, 1779477, 1779478 | ||
| Bug Blocks: | 1758252 | ||
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Description
Dhananjay Arunesh
2019-10-03 16:49:09 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1758249] kernel-5.3.6-100.fc29, kernel-headers-5.3.6-100.fc29, kernel-tools-5.3.6-100.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report. It -may- be possible that a local user can use this to directly control attached ISDN hardware, hanging up the connection or redialing long distance/high fee numbers incurring large fees to the telephony systems. Mitigation: At this time the only known way to 'mitigate' this flaw is to blacklist the kernel module from being loaded. Creating raw sockets with this protocol is a method of communicating with ISDN hardware, a technology that is becoming less and less common. Check https://access.redhat.com/solutions/41278 for instructions on how to disable the mISDN_core.ko module. This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2020:0790 https://access.redhat.com/errata/RHSA-2020:0790 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2019-17055 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:1567 https://access.redhat.com/errata/RHSA-2020:1567 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:1769 https://access.redhat.com/errata/RHSA-2020:1769 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:4062 https://access.redhat.com/errata/RHSA-2020:4062 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:4060 https://access.redhat.com/errata/RHSA-2020:4060 |