CVE-2021-27217
CVSS V2 Low 3.5
CVSS V3 Medium 4.4
Description
An issue was discovered in the _send_secure_msg() function of Yubico yubihsm-shell through 2.0.3. The function does not correctly validate the embedded length field of an authenticated message received from the device. Out-of-bounds reads performed by aes_remove_padding() can crash the running process, depending on the memory layout. This could be used by an attacker to cause a client-side denial of service. The yubihsm-shell project is included in the YubiHSM 2 SDK product.
Overview
- CVE ID
- CVE-2021-27217
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-04T18:15:14
- Last Modified Date
- 2021-03-26T20:07:43
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:* | 1 | OR | 2.0.3 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:S/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- SINGLE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 3.5
- Severity
- LOW
- Exploitability Score
- 6.8
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- HIGH
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 4.4
- Base Severity
- MEDIUM
- Exploitability Score
- 0.7
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://www.yubico.com/support/security-advisories/ysa-2021-01/ | Vendor Advisory |
| https://github.com/Yubico/yubihsm-shell/releases | Release Notes Third Party Advisory |
| https://blog.inhq.net/posts/yubico-libyubihsm-vuln2 | Exploit Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-27217 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27217 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:18:29 | Added to TrackCVE | |||
| 2022-12-05 23:07:18 | 2021-03-04T18:15Z | 2021-03-04T18:15:14 | CVE Published Date | updated |
| 2022-12-05 23:07:18 | 2021-03-26T20:07:43 | CVE Modified Date | updated | |
| 2022-12-05 23:07:18 | Analyzed | Vulnerability Status | updated |