CVE-2020-11810
CVSS V2 Medium 4.3
CVSS V3 Low 3.7
Description
An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 (P_DATA_V2) packet using a victim's peer-id. Normally such packets are dropped, but if this packet arrives before the data channel crypto parameters have been initialized, the victim's connection will be dropped. This requires careful timing due to the small time window (usually within a few seconds) between the victim client connection starting and the server PUSH_REPLY response back to the client. This attack will only work if Negotiable Cipher Parameters (NCP) is in use.
Overview
- CVE ID
- CVE-2020-11810
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-04-27T15:15:12
- Last Modified Date
- 2022-05-12T20:14:32
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* | 1 | OR | 2.4.0 | 2.4.9 |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- LOW
- Base Score
- 3.7
- Base Severity
- LOW
- Exploitability Score
- 2.2
- Impact Score
- 1.4
References
| Reference URL | Reference Tags |
|---|---|
| https://community.openvpn.net/openvpn/ticket/1272 | Exploit Vendor Advisory |
| https://security-tracker.debian.org/tracker/CVE-2020-11810 | Third Party Advisory |
| https://patchwork.openvpn.net/patch/1079/ | Patch Vendor Advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1169925 | Issue Tracking Third Party Advisory |
| https://github.com/OpenVPN/openvpn/commit/37bc691e7d26ea4eb61a8a434ebd7a9ae76225ab | Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FGHHV4YZANZW45KZTJJGVGPFMSXYRCKZ/ | Mailing List Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JII7RYYYRBPQNEGGVSOXCM7JUZ43T3VH/ | Mailing List Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-11810 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11810 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-08 06:19:59 | Added to TrackCVE | |||
| 2022-12-04 15:42:44 | 2020-04-27T15:15Z | 2020-04-27T15:15:12 | CVE Published Date | updated |
| 2022-12-04 15:42:44 | 2022-05-12T20:14:32 | CVE Modified Date | updated | |
| 2022-12-04 15:42:44 | Analyzed | Vulnerability Status | updated |