发布时间: 2023年4月11日
修改时间: 2023年4月11日
A read buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. The read buffer overrun might result in a crash which could lead to a denial of service attack. In theory it could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext) although we are not aware of any working exploit leading to memory contents disclosure as of the time of release of this advisory. In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects.
| NVD | openEuler | |
|---|---|---|
| CVSS评分 | 4.9 | 4.9 |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | High | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality | None | High |
| Integrity | None | None |
| Availability | High | High |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2023-1259 | A read buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. The read buffer overrun might result in a crash which could lead to a denial of service attack. In theory it could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext) although we are not aware of any working exploit leading to memory contents disclosure as of the time of release of this advisory. In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects. | 2023年4月11日 |
| 产品 | 包 | 状态 |
|---|---|---|
| KY3.4-4A | edk2 | Unaffected |
| KY3.4-5A | edk2 | Unaffected |
| KY3.5.1 | edk2 | Unaffected |
| KY3.5.2 | edk2 | Unaffected |
