OpenSLP as used in VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202010401-SG, 6.5 before ESXi650-202010401-SG) has a use-after-free issue. A malicious actor residing in the management network who has access to port 427 on an ESXi machine may be able to trigger a use-after-free in the OpenSLP service resulting in remote code execution.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://www.vmware.com/security/advisories/VMSA-2020-0023.html | patch vendor advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-20-1377/ | vdb entry third party advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-20-1385/ | vdb entry third party advisory |