CVE-2023-0361
To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.4 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 1.45% probability · 73th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- gnu/gnutls · redhat/enterprise linux · debian/debian linux · fedoraproject/fedora · netapp/active iq unified manager · netapp/converged systems advisor agent · netapp/ontap select deploy administration utility
- Source
- secalert@redhat.com
EPSS 1.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/security/cve/CVE-2023-0361Third Party Advisory
- https://github.com/tlsfuzzer/tlsfuzzer/pull/679Issue Tracking, Patch
- https://gitlab.com/gnutls/gnutls/-/issues/1050Exploit, Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/02/msg00015.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFIA3X4IZ3CW7SRQ2UHNHNPMRIAWF2FI/
- 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/Z634YBXAJ5VLDI62IOPBVP5K6YFHAWCY/
- https://security.netapp.com/advisory/ntap-20230324-0005/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230725-0005/
- https://access.redhat.com/security/cve/CVE-2023-0361Third Party Advisory
- https://github.com/tlsfuzzer/tlsfuzzer/pull/679Issue Tracking, Patch
- https://gitlab.com/gnutls/gnutls/-/issues/1050Exploit, Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/02/msg00015.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFIA3X4IZ3CW7SRQ2UHNHNPMRIAWF2FI/
- 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/Z634YBXAJ5VLDI62IOPBVP5K6YFHAWCY/
- https://security.netapp.com/advisory/ntap-20230324-0005/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230725-0005/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-806742.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.