CVE-2021-3700 is a use-after-free vulnerability in usbredir, affecting versions prior to 0.11.0, specifically within the usbredirparser_serialize() function when handling large buffered write data. This flaw impacts products from Debian, Fedora Project, Red Hat, and Spice Space. With a CVSS score of 6.4 (MEDIUM), it requires high privileges and local access (AV:L/PR:H) but can lead to high confidentiality, integrity, and availability impacts (C:H/I:H/A:H). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.11.0CPE matchmatch criteria | cpe:2.3:a:spice-space:usbredir:*:*:*:*:*:*:*:* | ||
6.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | ||
7.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
CVE-2021-3700
Mar 8, 2022A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbredirparser.c. This issue occurs when serializing large amounts of buffered write data in the case of a slow or blocked destination.
Feb 8, 2022usbredir: use-after-free in usbredirparser_serialize() in usbredirparser/usbredirparser.c
Aug 8, 2021