Qemu: vnc: infinite loop in inflate_buffer() leads to denial of service
CVE-2023-3255

6.5MEDIUM

Key Information:

Vendor
Red Hat
Status
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Vendor
CVE Published:
13 September 2023

Summary

A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the inflate_buffer function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service.

Affected Version(s)

Red Hat Enterprise Linux 8 8100020240314161907.e155f54d

Red Hat Enterprise Linux 8 8100020240314161907.e155f54d

Red Hat Enterprise Linux 9 17:8.2.0-11.el9_4

References

https://access.redhat.com/errata/RHSA-2024:2135
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:2962
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-3255
vdb-entryx_refsource_REDHAT

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Kevin Denis (Synacktiv) for reporting this issue.
.