High advisory for FreeRDP

Advisory overview

FreeRDP before 3.32.2 contains a double free in the WinPR Kerberos SSPI retrieveSomeTgt function, which installs the krb5 default realm into a target principal that has an empty realm without taking ownership of it. Unauthenticated remote clients can send a crafted NLA/CredSSP u2u TGT request whose server-name component contains '@' to corrupt the heap and crash the server process.

Related references

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2557-79qc-6gfr
• https://www.vulncheck.com/advisories/freerdp-before-3.32.2-double-free-in-winpr-kerberos-retrievesometgt
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-2557-79qc-6gfr