CVE-2022-42475-RCE-POC

漏洞名称

CVE-2022-42475 Fortinet RCE Vulnerability POC

漏洞成因

Due to a validation flaw in user input by sslvpnd, an unauthenticated attacker can trigger a buffer overflow by sending specially crafted packets, ultimately achieving arbitrary code execution on the target system.

受影响版本

2.0 <= FortiOS <= 7.2.2 0.0 <= FortiOS <= 7.0.8 4.0 <= FortiOS <= 6.4.10 2.0 <= FortiOS <= 6.2.11 0.0 <= FortiOS-6K7K <= 7.0.7 4.0 <= FortiOS-6K7K <= 6.4.9 2.0 <= FortiOS-6K7K <= 6.2.11 0.0 <= FortiOS-6K7K <= 6.0.14

不受影响版本

FortiOS >= 7.2.3 FortiOS >= 7.0.9 FortiOS >= 6.4.11 FortiOS >= 6.2.12 FortiOS-6K7K >= 7.0.8 FortiOS-6K7K >= 6.4.10 FortiOS-6K7K >= 6.2.12 FortiOS-6K7K >= 6.0.15

修复方案

The official security version has been released to fix this vulnerability. Affected users are advised to upgrade for protection: https://docs.fortinet.com/product/fortigate/7.2

IOC自查

Check whether the following log entries exist in the system: Logdesc=”Application crashed” and msg=”[…] application:sslvpnd,[…], Signal 11 received, Backtrace: […]”

检查系统中是否存在以下文件

/data/lib/libips.bak /data/lib/libgif.so /data/lib/libiptcp.so /data/lib/libipudp.so /data/lib/libjepg.so /var/.sslvpnconfigbk /data/etc/wxd.conf /flash

用户可通过以下命令来对上述文件进行检查：

diagnose sys last-modified-files /data/lib diagnose sys last-modified-files /var/ diagnose sys last-modified-files /data/etc/ diagnose sys last-modified-files /flash