CVE-2026-3497— OpenSSH 安全漏洞

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Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.

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对未经初始化资源的使用

OpenSSH 安全漏洞

OpenSSH（OpenBSD Secure Shell）是加拿大OpenBSD开源的一套用于安全访问远程计算机的连接工具。该工具是SSH协议的开源实现，支持对所有的传输进行加密，可有效阻止窃听、连接劫持以及其他网络级的攻击。 OpenSSH存在安全漏洞，该漏洞源于GSSAPI补丁在错误处理时未能彻底终止进程，导致程序继续向下执行并访问了未初始化的栈变量，进而引发未定义行为。

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