CVE-2023-0361High· 7.4▾ MidnightPoC availableA 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…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 40.7 · likelihood 0.3 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
1.4%
Exploit / PoC code exists
1.4% → 1.5%
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.
Field changes observed since this record was first indexed.
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.
CVE-2020-13777High· 7.4GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3)
CVE-2024-28834Medium· 5.3A flaw was found in GnuTLS
CVE-2024-0553High· 7.5A vulnerability was found in GnuTLS
CVE-2022-2509High· 7.5A vulnerability found in gnutls
CVE-2021-4209Medium· 6.5A NULL pointer dereference flaw was found in GnuTLS