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Vulnerabilities

Vulnerability · CVE-2023-0361

A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS.

Published Feb 15, 2023 · catalog updated Oct 14, 2026 · A timing side-channel in

Check if you run it

No confirmed exploitation is on record for CVE-2023-0361. EPSS is 1.45%. Act only if a listed version of A timing side-channel in is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A timing side-channel in).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.45%
Remediation
Advisory link
Affected products
cpe debian/debian linux · cpe fedoraproject/fedora · cpe gnu/gnutls · cpe netapp/active iq unified manager · cpe redhat/enterprise linux

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux10.0
  • cpe fedoraproject/fedora36
  • cpe fedoraproject/fedora37
  • cpe fedoraproject/fedora38
  • cpe gnu/gnutls3.6.8-11.el8_2
  • cpe netapp/active iq unified managerversion unspecified
  • cpe redhat/enterprise linux8.0
  • cpe redhat/enterprise linux9.0

How to fix CVE-2023-0361

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-0361. EPSS is 1.45%. Act only if a listed version of A timing side-channel in is installed.

Which versions are affected?

Compare what you have installed with debian/debian linux 10.0; redhat/enterprise linux 8.0; redhat/enterprise linux 9.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-203: Observable Discrepancy. EPSS 1.45%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 15, 2023 · NIST NVD

    Detected

    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 f

  2. Oct 14, 2026 · NIST NVD

    Updated

    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 f

Sources

  • CVE.orgVulnerability recordCVE-2023-0361

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-0361

    30-day exploitation probability 1.5%

    first.org
  • NIST NVDVulnerability recordCVE-2023-0361

    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 attac

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.