Описание
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.
Ссылки
- Issue TrackingThird Party Advisory
- ExploitVendor Advisory
- PatchThird Party Advisory
- Mailing ListThird Party Advisory
- PatchVendor Advisory
- Third Party Advisory
- Issue TrackingThird Party Advisory
- ExploitVendor Advisory
- PatchThird Party Advisory
- Mailing ListThird Party Advisory
- PatchVendor Advisory
- Third Party Advisory
Уязвимые конфигурации
Одно из
Одно из
EPSS
3.7 Low
CVSS3
4.3 Medium
CVSS2
Дефекты
Связанные уязвимости
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.
An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can ...
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.
Уязвимость программного обеспечения OpenVPN, существущая из-за недостаточной проверки входных данных, позволяющая нарушителю перевести сеанс клиента на новый IP-адрес и вызвать отказ в обслуживании
EPSS
3.7 Low
CVSS3
4.3 Medium
CVSS2