Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - 已修复 Linux 内核中的下列漏洞：scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername() Fix a NULL pointer crash that occurs when we are freeing the socket at the same time we access it via sysfs. The problem is that: 1. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() take the frwd_lock and do sock_hold() then drop the frwd_lock. sock_hold() does a get on the struct sock. 2. iscsi_sw_tcp_release_conn() does sockfd_put() which does the last put on the struct socket and that does __sock_release() which sets the sock->ops to NULL. 3.
    iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() then call kernel_getpeername() which accesses the NULL sock->ops. Above we do a get on the struct sock, but we needed a get on the struct socket. Originally, we just held the frwd_lock the entire time but in commit bcf3a2953d36 (scsi: iscsi:
    iscsi_tcp: Avoid holding spinlock while calling getpeername()) we switched to refcount based because the network layer changed and started taking a mutex in that path, so we could no longer hold the frwd_lock.
    Instead of trying to maintain multiple refcounts, this just has us use a mutex for accessing the socket in the interface code paths. (CVE-2022-50459)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

检测

Linux Distros 未修补的漏洞：CVE-2022-50459

high Nessus 插件 ID 269604

未找到变更日志