CVE-2020-1921
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
In the crypt function, we attempt to null terminate a buffer using the size of the input salt without validating that the offset is within the buffer. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.
Overview
- CVE ID
- CVE-2020-1921
- Assigner
- cve-assign@fb.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-10T16:15:14
- Last Modified Date
- 2021-03-15T15:29:38
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | 1 | OR | 4.56.3 | |
| cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | 1 | OR | 4.57.0 | 4.80.2 |
| cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:* | 1 | OR | 4.81.0 | 4.93.2 |
| cpe:2.3:a:facebook:hhvm:4.94.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:facebook:hhvm:4.95.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:facebook:hhvm:4.96.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:facebook:hhvm:4.97.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:facebook:hhvm:4.98.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/facebook/hhvm/commit/08193b7f0cd3910256e00d599f0f3eb2519c44ca | Patch Third Party Advisory |
| https://hhvm.com/blog/2021/02/25/security-update.html | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-1921 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1921 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:19:59 | Added to TrackCVE | |||
| 2022-12-05 23:25:59 | 2021-03-10T16:15Z | 2021-03-10T16:15:14 | CVE Published Date | updated |
| 2022-12-05 23:25:59 | 2021-03-15T15:29:38 | CVE Modified Date | updated | |
| 2022-12-05 23:25:59 | Analyzed | Vulnerability Status | updated |