Spice
CVE-2021-20201
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Resource consumption limits
MITRE ATT&CK
1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 5.3 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | A remote attacker could cause denial of service by exhausting system resources by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
A flaw was found in spice in versions before 0.14.92. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection. Affected products include: Spice Project Spice, Redhat Enterprise Linux. Version information: before 0.14.92..
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
The smartcard interaction in SPICE allows remote attackers to cause a denial of service (QEMU-KVM process crash) or poss
Stack-based buffer overflow in the reds_handle_ticket function in server/reds.c in SPICE 0.12.0 allows remote attackers
spice versions though 0.13 are vulnerable to out-of-bounds memory access when processing specially crafted messages from
Multiple integer overflow and buffer overflow issues were discovered in spice-client's handling of LZ compressed frames.
A vulnerability was discovered in SPICE before version 0.14.1 where the generated code used for demarshalling messages l
Heap-based buffer overflow in SPICE before 0.12.6 allows guest OS users to cause a denial of service (heap-based memory
Out-of-bounds heap reads and writes in spice-server's SPICE_MSGC_MIGRATE_DATA handling let an authenticated SPICE client
Spice, versions 0.5.2 through 0.14.1, are vulnerable to an out-of-bounds read due to an off-by-one error in memslot_get_
Heap-based buffer overflow in SPICE before 0.12.6 allows guest OS users to read and write to arbitrary memory locations
SPICE allows local guest OS users to read from or write to arbitrary host memory locations via crafted primary surface p
Race condition in the worker_update_monitors_config function in SPICE 0.12.4 allows a remote authenticated guest user to
Multiple buffer overflow vulnerabilities were found in the QUIC image decoding process of the SPICE remote display syste
GitHub PoC
Exploit-DB