CVE-2023-0361
High
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.
SeverityHigh
CVSS7.4
Exploit probability—
Product
Gnutls
PublishedFeb 15, 2023
First seenFeb 15, 2023
Weakness typeCWE-203CWE-203
How to fix
Vendor advisories
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFIA3X4IZ3CW7SRQ2UHNHNPMRIAWF2FI/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z634YBXAJ5VLDI62IOPBVP5K6YFHAWCY/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS4KVDOG6QTALWHC2QE4Y7VPDRMLTRWQ/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu gnutls | 3.6.8-11.el8_2 | — |
| redhat enterprise_linux | 8.0, 9.0 | — |
| debian debian_linux | 10.0 | — |
| fedoraproject fedora | 36, 37, 38 | — |
| netapp active_iq_unified_manager | No range specified | — |
| netapp converged_systems_advisor_agent | No range specified | — |
| netapp ontap_select_deploy_administration_utility | No range specified | — |
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