CVE-2017-7520
Debian Security Advisory 3900-1
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker.
Las versiones anteriores a 2.4.3 y anterior a 2.3.17 de OpenVPN, son vulnerables a la denegación de servicio y/o posiblemente a la pérdida de memoria confidencial activada por un atacante de tipo man-in-the-middle.
Karthikeyan Bhargavan and Gaetan Leurent discovered that 64-bit block ciphers are vulnerable to a birthday attack. A remote attacker could possibly use this issue to recover cleartext data. Fixing this issue requires a configuration change to switch to a different cipher. This update adds a warning to the log file when a 64-bit block cipher is in use. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. It was discovered that OpenVPN incorrectly handled rollover of packet ids. An authenticated remote attacker could use this issue to cause OpenVPN to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. Various other issues were also addressed.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2017-04-05 CVE Reserved
- 2017-06-22 CVE Published
- 2024-08-05 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-125: Out-of-bounds Read
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CAPEC
References (4)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/99230 | Third Party Advisory | |
| http://www.securitytracker.com/id/1038768 | Vdb Entry |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://www.debian.org/security/2017/dsa-3900 | 2019-10-03 | |
| https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243 | 2019-10-03 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | <= 2.3.16 Search vendor "Openvpn" for product "Openvpn" and version " <= 2.3.16" | - |
Affected
| ||||||
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | 2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0" | - |
Affected
| ||||||
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | 2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0" | alpha2 |
Affected
| ||||||
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | 2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0" | beta1 |
Affected
| ||||||
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | 2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0" | beta2 |
Affected
| ||||||
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | 2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0" | rc1 |
Affected
| ||||||
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | 2.4.0 Search vendor "Openvpn" for product "Openvpn" and version "2.4.0" | rc2 |
Affected
| ||||||
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | 2.4.1 Search vendor "Openvpn" for product "Openvpn" and version "2.4.1" | - |
Affected
| ||||||
| Openvpn Search vendor "Openvpn" | Openvpn Search vendor "Openvpn" for product "Openvpn" | 2.4.2 Search vendor "Openvpn" for product "Openvpn" and version "2.4.2" | - |
Affected
| ||||||