CVE-2023-0361

Description

A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.

References

https://security.netapp.com/advisory/ntap-20230725-0005/

https://security.netapp.com/advisory/ntap-20230324-0005/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z634YBXAJ5VLDI62IOPBVP5K6YFHAWCY/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS4KVDOG6QTALWHC2QE4Y7VPDRMLTRWQ/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFIA3X4IZ3CW7SRQ2UHNHNPMRIAWF2FI/

https://lists.debian.org/debian-lts-announce/2023/02/msg00015.html

https://gitlab.com/gnutls/gnutls/-/issues/1050

https://github.com/tlsfuzzer/tlsfuzzer/pull/679

https://access.redhat.com/security/cve/CVE-2023-0361

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3