GHSA-q2fm-89c2-x6c2: 
A vulnerability has been identified in SIPROTEC 5 6MD85 devices (CPU variant CP200) (All versions), SIPROTEC 5 6MD85 devices (CPU variant CP300) (All versions), SIPROTEC 5 6MD86 devices (CPU variant CP200) (All versions), SIPROTEC 5 6MD86 devices (CPU variant CP300) (All versions), SIPROTEC 5 6MD89 devices (CPU variant CP300) (All versions), SIPROTEC 5 6MU85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7KE85 devices (CPU variant CP200) (All versions), SIPROTEC 5 7KE85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SA82 devices (CPU variant CP100) (All versions), SIPROTEC 5 7SA82 devices (CPU variant CP150) (All versions), SIPROTEC 5 7SA86 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SA86 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SA87 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SA87 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SD82 devices (CPU variant CP100) (All versions), SIPROTEC 5 7SD82 devices (CPU variant CP150) (All versions), SIPROTEC 5 7SD86 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SD86 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SD87 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SD87 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SJ81 devices (CPU variant CP100) (All versions), SIPROTEC 5 7SJ81 devices (CPU variant CP150) (All versions), SIPROTEC 5 7SJ82 devices (CPU variant CP100) (All versions), SIPROTEC 5 7SJ82 devices (CPU variant CP150) (All versions), SIPROTEC 5 7SJ85 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SJ85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SJ86 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SJ86 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SK82 devices (CPU variant CP100) (All versions), SIPROTEC 5 7SK82 devices (CPU variant CP150) (All versions), SIPROTEC 5 7SK85 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SK85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SL82 devices (CPU variant CP100) (All versions), SIPROTEC 5 7SL82 devices (CPU variant CP150) (All versions), SIPROTEC 5 7SL86 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SL86 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SL87 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SL87 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SS85 devices (CPU variant CP200) (All versions), SIPROTEC 5 7SS85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7ST85 devices (CPU variant CP200) (All versions), SIPROTEC 5 7ST85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7SX85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7UM85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7UT82 devices (CPU variant CP100) (All versions), SIPROTEC 5 7UT82 devices (CPU variant CP150) (All versions), SIPROTEC 5 7UT85 devices (CPU variant CP200) (All versions), SIPROTEC 5 7UT85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7UT86 devices (CPU variant CP200) (All versions), SIPROTEC 5 7UT86 devices (CPU variant CP300) (All versions), SIPROTEC 5 7UT87 devices (CPU variant CP200) (All versions), SIPROTEC 5 7UT87 devices (CPU variant CP300) (All versions), SIPROTEC 5 7VE85 devices (CPU variant CP300) (All versions), SIPROTEC 5 7VK87 devices (CPU variant CP200) (All versions), SIPROTEC 5 7VK87 devices (CPU variant CP300) (All versions), SIPROTEC 5 Communication Module ETH-BA-2EL (All versions), SIPROTEC 5 Communication Module ETH-BB-2FO (All versions), SIPROTEC 5 Communication Module ETH-BD-2FO (All versions), SIPROTEC 5 Compact 7SX800 devices (CPU variant CP050) (All versions). Affected devices do not properly restrict secure client-initiated renegotiations within the SSL and TLS protocols. This could allow an attacker to create a denial of service condition on the ports 443/tcp and 4443/tcp for the duration of the attack.
CVSS v3.1: 5.3