CVE-2021-28484
First published: Wed Apr 14 2021(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Yubico Yubihsm Connector | <3.0.1 | |
| Fedoraproject Fedora | =34 |
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Reference Links
- https://github.com/Yubico/yubihsm-connector/releases
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B7Q2KGXSPQEEONAWMFZRVH2TXWX3QPCQ/
- https://www.yubico.com/support/security-advisories/ysa-2021-02/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B7Q2KGXSPQEEONAWMFZRVH2TXWX3QPCQ/
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-28484.
What is the affected software?
The affected software is Yubico Yubihsm Connector version up to and excluding 3.0.1.
What is the severity of CVE-2021-28484?
The severity of CVE-2021-28484 is high.
How can this vulnerability be exploited?
This vulnerability can be exploited by sending a request of invalid length to the /api/connector endpoint in Yubico yubihsm-connector.
Are there any references related to this vulnerability?
Yes, you can find references related to this vulnerability at the following links: [GitHub](https://github.com/Yubico/yubihsm-connector/releases), [Fedora Project](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B7Q2KGXSPQEEONAWMFZRVH2TXWX3QPCQ/), [Yubico](https://www.yubico.com/support/security-advisories/ysa-2021-02/).
- collector/nvd-index
- agent/author
- agent/weakness
- agent/references
- agent/severity
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- agent/event
- agent/tags
- agent/type
- collector/mitre-cve
- source/MITRE
- vendor/yubico
- canonical/yubico yubihsm connector
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/34