Vulnerability · Published May 28, 2021 · Assigned by redhat
CVE-2021-20201
Medium 5.3
In plain English
A medium-severity uncontrolled resource consumption in spice. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.7% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.3Medium
Exploit odds (30 days)2.7%top 14.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | spice-server | 0.14.3-4.el8 | ALSA-2021:1924 |
| AlmaLinux:8 | spice-server-devel | 0.14.3-4.el8 | ALSA-2021:1924 |
| Alpine:v3.20 | spice | 0.14.3-r1 | ALPINE-CVE-2021-20201 |
| Alpine:v3.21 | spice | 0.14.3-r1 | ALPINE-CVE-2021-20201 |
| Alpine:v3.22 | spice | 0.14.3-r1 | ALPINE-CVE-2021-20201 |
| Alpine:v3.23 | spice | 0.14.3-r1 | ALPINE-CVE-2021-20201 |
| Alpine:v3.24 | spice | 0.14.3-r1 | ALPINE-CVE-2021-20201 |
| Debian:12 | spice | 0.14.3-2.1 | DEBIAN-CVE-2021-20201 |
| Debian:13 | spice | 0.14.3-2.1 | DEBIAN-CVE-2021-20201 |
| Debian:14 | spice | 0.14.3-2.1 | DEBIAN-CVE-2021-20201 |
| Rocky Linux:8 | spice | 0:0.14.3-4.el8 | RLSA-2021:1924 |
Affected products (as reported)
Weakness: CWE-400
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1921846 x_refsource_MISC
- https://blog.qualys.com/product-tech/2011/10/31/tls-renegotiation-and-denial-of-service-attacks x_refsource_MISC
- GLSA-202208-10 vendor-advisory, x_refsource_GENTOO