A vulnerability was detected in open62541 up to 1.5.5. Affected by this vulnerability is the function UADataValuebackendcopyRange of the file plugins/historydata/uahistorydatabackendmemory.c of the component History Backend. The manipulation results in use after free. The attack can be launched remotely. The exploit is now public and may be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

A vulnerability was determined in o6 open62541 ca356b088ada7dee824d1b4acd07c1ff07ce242b. Impacted is the function UAClientgetRemoteDataTypes of the file examples/customdatatype/clienttypescustom.c. Executing a manipulation can lead to use after free. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. The project closed the issue report, stating that this is not the official way to report a security vulnerability.

open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UAENABLEGDSPUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.

Open62541 v1.4.6 is has an assertion failure in fuzzbinarydecode, which leads to a crash.

The package open62541/open62541 before 1.2.5, from 1.3-rc1 and before 1.3.1 are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.

VariantencodeJson in open62541 1.x before 1.0.4 has an out-of-bounds write for a large recursion depth.