Bug 2254825 (CVE-2023-6683)
Summary: | CVE-2023-6683 QEMU: VNC: NULL pointer dereference in qemu_clipboard_request() | ||
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Product: | [Other] Security Response | Reporter: | Mauro Matteo Cascella <mcascell> |
Component: | vulnerability | Assignee: | Product Security <prodsec-ir-bot> |
Status: | NEW --- | QA Contact: | |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | unspecified | CC: | ailan, ddepaula, jen, jferlan, jmaloy, kkiwi, knoel, mrezanin, mst, nilal, pbonzini, security-response-team, ymankad |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | qemu-kvm 9.0.0 | Doc Type: | --- |
Doc Text: |
A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 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: | 2258118 | ||
Bug Blocks: | 2254016 |
Description
Mauro Matteo Cascella
2023-12-16 17:33:41 UTC
Red Hat Product Security would like to thank Markus Frank (Proxmox) and Fiona Ebner (Proxmox) for reporting this issue. Created qemu tracking bugs for this issue: Affects: fedora-all [bug 2258118] Upstream commit: https://gitlab.com/qemu-project/qemu/-/commit/405484b29f6548c7b86549b0f961b906337aa68a This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2024:2135 https://access.redhat.com/errata/RHSA-2024:2135 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2024:2962 https://access.redhat.com/errata/RHSA-2024:2962 |