CVE-2020-25653

Exp

A race condition vulnerability was found in the way the spice-vdagentd daemon handled new client connections. This flaw may allow an unprivileged local guest user to become the active agent for spice-vdagentd, possibly resulting in a denial of service or information leakage from the host. The highest threat from this vulnerability is to data confidentiality as well as system availability. This flaw affects spice-vdagent versions 0.20 and prior.

Published: 2020-11-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-25653 is rated Exploit Available (51/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.11%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-25653

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-25653

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.04% 0.11% +0.07%
2 2025-11-18 0.11% 0.04% -0.07%
3 2025-03-30 — 0.11% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-25653

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.3 3.1 MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.0 5.2 [email protected]
5.4 2.0 MEDIUM
AV:L/AC:M/Au:N/C:P/I:N/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 7.8 [email protected]

Weakness enumeration for CVE-2020-25653

OS Trackers for CVE-2020-25653

vendor priority summary link
debian not yet assigned CVE-2020-25653 not yet assigned priority: Debian including 1 source packages (spice-vdagent), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-25653
redhat medium — https://access.redhat.com/security/cve/CVE-2020-25653
suse high CVE-2020-25653 severity important: SUSE including 8 source package names (spice-vdagent-0.16.0-8.8.2, spice-vdagent-0.17.0-4.3.1, …), 28 product×package rows across 28 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (28 product lines)): Fixed 28. https://www.suse.com/security/cve/CVE-2020-25653/
ubuntu low CVE-2020-25653 low priority: Ubuntu including 1 source packages (spice-vdagent), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 13, DNE 1, needed 1, needs-triage 1. https://ubuntu.com/security/CVE-2020-25653

Affected software / configurations for CVE-2020-25653

Vendor Product Version Raw CPE
spice-space spice-vdagent <= 0.20.0 cpe:2.3:a:spice-space:spice-vdagent:*:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
fedoraproject fedora 32 cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
fedoraproject fedora 33 cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

References for CVE-2020-25653

cvelogic Threat Intelligence