log4j2漏洞

https://zhuanlan.zhihu.com/p/443575682

复现代码

/**
 * @author xiaobai
 */
@RequestMapping("/test")
@RestController
@Slf4j
public class TestController {

    private static Logger getLoggerName() {
        return LoggerFactory.getLogger("userMetadataTo");
    }

    /**
     * testMsgSend
     *
     * @param user user
     * @return ResponseEntity
     */
    @PostMapping("/msg")
    public ResponseEntity testMsgSend(@RequestBody User user) {
        Logger logger = getLoggerName();
        logger.info(user.getUsername());
        return ResponseEntity.ok().build();

    }

}

风险代码

没有设置-Dlog4j2.formatMsgNoLookups时此处noLookups为false，因此可以进入该判断

分析调用链，可以看到最终调用了JndiLookup.lookup执行ldap指令

临时解决方案

设置-Dlog4j2.formatMsgNoLookups=true

标签：return,临时,formatMsgNoLookups,漏洞,user,ResponseEntity,Logger,log4j2
来源： https://www.cnblogs.com/alinainai/p/15674463.html