Bug 1861118 (CVE-2020-15706)
| Summary: | CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Marco Benatto <mbenatto> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | bootloader-eng-team, fmartine, lkundrak, pjones, security-response-team |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | grub 2.06 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-07-29 19:28:13 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: | 1861120, 1861121, 1861122, 1861123, 1861124, 1861125, 1861126, 1861127, 1861128, 1861130, 1861131, 1863023 | ||
| Bug Blocks: | 1852004 | ||
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Description
Marco Benatto
2020-07-27 20:48:09 UTC
Defining a new function with the same name as a previously defined function causes the grub_script and associated resources for the previous function to be freed. If the previous function is currently executing when a function with the same name is defined, this results in use-after-frees when processing subsequent commands in the original function. Acknowledgments: Name: Chris Coulson (Canonical) This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:3216 https://access.redhat.com/errata/RHSA-2020:3216 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-2020-15706 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:3217 https://access.redhat.com/errata/RHSA-2020:3217 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2020:3223 https://access.redhat.com/errata/RHSA-2020:3223 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions Via RHSA-2020:3227 https://access.redhat.com/errata/RHSA-2020:3227 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.2 Advanced Update Support Via RHSA-2020:3273 https://access.redhat.com/errata/RHSA-2020:3273 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.4 Advanced Update Support Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions Red Hat Enterprise Linux 7.4 Telco Extended Update Support Via RHSA-2020:3275 https://access.redhat.com/errata/RHSA-2020:3275 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.6 Extended Update Support Via RHSA-2020:3271 https://access.redhat.com/errata/RHSA-2020:3271 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.3 Advanced Update Support Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions Red Hat Enterprise Linux 7.3 Telco Extended Update Support Via RHSA-2020:3276 https://access.redhat.com/errata/RHSA-2020:3276 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Extended Update Support Via RHSA-2020:3274 https://access.redhat.com/errata/RHSA-2020:3274 Created grub2 tracking bugs for this issue: Affects: fedora-all [bug 1863023] |