Qemu: vnc: infinite loop in inflate_buffer() leads to denial of service
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.
02 / AFFECTED SOFTWARE
Affected packages
236 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://access.redhat.com/downloads/content/package-browser/
- https://access.redhat.com/errata/RHSA-2024:2135
- https://access.redhat.com/errata/RHSA-2024:2962
- https://access.redhat.com/security/cve/CVE-2023-3255
- https://bugzilla.redhat.com/show_bug.cgi?id=2218486
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3255.json
- https://nvd.nist.gov/vuln/detail/CVE-2023-3255
- https://security.netapp.com/advisory/ntap-20231020-0008/