Vulnerability Details : CVE-2021-28484
An issue was discovered in the /api/connector endpoint handler in Yubico yubihsm-connector before 3.0.1 (in YubiHSM SDK before 2021.04). The handler did not validate the length of the request, which can lead to a state where yubihsm-connector becomes stuck in a loop waiting for the YubiHSM to send it data, preventing any further operations until the yubihsm-connector is restarted. An attacker can send 0, 1, or 2 bytes to trigger this.
Products affected by CVE-2021-28484
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:a:yubico:yubihsm_connector:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-28484
0.19%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 57 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-28484
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-28484
-
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-28484
-
https://www.yubico.com/support/security-advisories/ysa-2021-02/
Security Advisory YSA-2021-02 - YubicoVendor Advisory
-
https://github.com/Yubico/yubihsm-connector/releases
Releases · Yubico/yubihsm-connector · GitHubThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B7Q2KGXSPQEEONAWMFZRVH2TXWX3QPCQ/
[SECURITY] Fedora 34 Update: yubihsm-connector-3.0.1-1.fc34 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
Jump to