CVE-2021-26109
CVSS V2 High 7.5
CVSS V3 Critical 9.8
Description
An integer overflow or wraparound vulnerability in the memory allocator of SSLVPN in FortiOS before 7.0.1 may allow an unauthenticated attacker to corrupt control data on the heap via specifically crafted requests to SSLVPN, resulting in potentially arbitrary code execution.
Overview
- CVE ID
- CVE-2021-26109
- Assigner
- psirt@fortinet.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-12-08T13:15:07
- Last Modified Date
- 2021-12-09T20:52:35
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | 1 | OR | 6.0.0 | 6.0.12 |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | 1 | OR | 6.2.0 | 6.2.9 |
| cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:* | 1 | OR | 6.4.0 | 6.4.5 |
| cpe:2.3:o:fortinet:fortios:7.0.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 7.5
- Severity
- HIGH
- Exploitability Score
- 10
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 9.8
- Base Severity
- CRITICAL
- Exploitability Score
- 3.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://fortiguard.com/advisory/FG-IR-21-049 | Patch Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-26109 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26109 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:41:53 | Added to TrackCVE | |||
| 2022-12-06 03:18:17 | 2021-12-08T13:15Z | 2021-12-08T13:15:07 | CVE Published Date | updated |
| 2022-12-06 03:18:17 | 2021-12-09T20:52:35 | CVE Modified Date | updated | |
| 2022-12-06 03:18:17 | Analyzed | Vulnerability Status | updated |