CVE-2021-20201
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.
Does this matter?
Lower severity and a low EPSS score (2.70%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 2.70% probability · 86th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- spice project/spice · redhat/enterprise linux
- Source
- secalert@redhat.com
EPSS 2.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://blog.qualys.com/product-tech/2011/10/31/tls-renegotiation-and-denial-of-service-attacksExploit, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1921846Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202208-10Third Party Advisory
- https://blog.qualys.com/product-tech/2011/10/31/tls-renegotiation-and-denial-of-service-attacksExploit, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1921846Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202208-10Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.