Marcin Szymanek

**Name of the Vulnerable Software and Affected Versions** Clavister cOS Core versions prior to 11.00.11 Clavister cOS Core versions 11.20.xx prior to 11.20.06 Clavister cOS Core versions 12.00.xx prior to 12.00.09 **Description** The issue allows remote attackers to decrypt RSA-encrypted nonces by leveraging a Bleichenbacher attack, affecting the IKEv1 implementation. **Recommendations** For versions prior to 11.00.11, update to version 11.00.11 or later. For versions 11.20.xx prior to 11.20.06, update to version 11.20.06 or later. For versions 12.00.xx prior to 12.00.09, update to version 12.00.09 or later.

Name of the Vulnerable Software and Affected Versions: Huawei Firewall products USG2205BSR version V300R001C10SPC600 Huawei Firewall products USG2220BSR version V300R001C00 Huawei Firewall products USG5120BSR version V300R001C00 Huawei Firewall products USG5150BSR version V300R001C00 Description: The issue is related to the IPSEC IKEv1 implementations of Huawei Firewall products, where improper handling of malformed messages can be exploited. An attacker may send crafted packets to the affected device, potentially leading to a denial of service. Recommendations: For USG2205BSR version V300R001C10SPC600, update the software to a version that properly handles malformed messages in IPSEC IKEv1 implementations. For USG2220BSR version V300R001C00, update the software to a version that properly handles malformed messages in IPSEC IKEv1 implementations. For USG5120BSR version V300R001C00, update the software to a version that properly handles malformed messages in IPSEC IKEv1 implementations. For USG5150BSR version V300R001C00, update the software to a version that properly handles malformed messages in IPSEC IKEv1 implementations.

Name of the Vulnerable Software and Affected Versions: Huawei Firewall products USG2205BSR version V300R001C10SPC600 Huawei Firewall products USG2220BSR version V300R001C00 Huawei Firewall products USG5120BSR version V300R001C00 Huawei Firewall products USG5150BSR version V300R001C00 Description: The issue is related to a DoS vulnerability in the IPSEC IKEv1 implementations of Huawei Firewall products. This vulnerability is caused by improper handling of malformed messages. An attacker can exploit this by sending crafted packets to the affected device, potentially leading to a denial of service. Recommendations: For USG2205BSR version V300R001C10SPC600, update the IPSEC IKEv1 implementation to properly handle malformed messages. For USG2220BSR version V300R001C00, update the IPSEC IKEv1 implementation to properly handle malformed messages. For USG5120BSR version V300R001C00, update the IPSEC IKEv1 implementation to properly handle malformed messages. For USG5150BSR version V300R001C00, update the IPSEC IKEv1 implementation to properly handle malformed messages. As a temporary workaround, consider restricting access to the IPSEC IKEv1 implementation until a patch is available.