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CVE-2023-3255

Date: September 13, 2023

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.

Language: C

Severity Score

Related Resources (8)

https://security-tracker.debian.org/tracker/CVE-2023-3255
https://bugzilla.redhat.com/show_bug.cgi?id=2218486
https://nvd.nist.gov/vuln/detail/CVE-2023-3255
https://access.redhat.com/errata/RHSA-2024:2135
https://access.redhat.com/security/cve/CVE-2023-3255
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2023-3255
https://security.netapp.com/advisory/ntap-20231020-0008/
https://www.mend.io/vulnerability-database/CVE-2023-3255

Severity Score

Weakness Type (CWE)

Loop with Unreachable Exit Condition ('Infinite Loop')

CWE-835

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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