CVE-2023-0361High· 7.4▾ TwilightA 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. T…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 40.7 · likelihood 0.3 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
1.4%
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.
gnutls = 3.6.8-11.el8_2enterprise_linux = 8.0enterprise_linux = 9.0debian_linux = 10.0fedora = 36fedora = 37fedora = 38active_iq_unified_managerconverged_systems_advisor_agentontap_select_deploy_administration_utilityRefer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2023-5981Medium· 5.9A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.
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