Medium severity · published Feb 24, 2022
CVE-2021-3700
A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbredirparser.c
6.4
CVSS
0.3%
EPSS
No
On KEV
Description
A 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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0 · source: NVD
EL
Enterprise Linux · Redhat
6.0; 7.0; 8.0 · source: NVD
FE
Fedora · Fedoraproject
34 · source: NVD
US
Usbredir · Spice-space
before 0.11.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3700
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3700
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1992830
Patch
https://gitlab.freedesktop.org/spice/usbredir/-/commit/03c519ff5831ba
Mailing List
https://lists.debian.org/debian-lts-announce/2022/03/msg00030.html
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