Is CVE-2023-0361 in the CISA KEV catalog?

No. CVE-2023-0361 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-0361?

CVE-2023-0361 has a CVSS v3 base score of 7.4 (HIGH).

What is the EPSS score for CVE-2023-0361?

CVE-2023-0361 has an EPSS score of 1.40% (69th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-0361?

Upgrade gnutls28 on debian 11 to 3.7.1-5+deb11u3 or later. Fixes are available for 23 affected products.

CVE & CISA-KEV Catalog

CVE-2023-0361

HIGH

7.4

CVSS v3

NVD

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.

CWE-203

How to fix

Remediation Available

gnutls28Debian

Fixed in:3.7.1-5+deb11u3CVE-2023-0361

Fixed in:3.7.8-5CVE-2023-0361

gnutlsRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutlsRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-c++Rocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-c++Red Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-c++-debuginfoRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-c++-debuginfoRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-daneRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-daneRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-dane-debuginfoRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-dane-debuginfoRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-debuginfoRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-debuginfoRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-debugsourceRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-debugsourceRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-develRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-develRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-utilsRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-utilsRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-utils-debuginfoRocky

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls-utils-debuginfoRed Hat / RHEL

Fixed in:0:3.6.16-5.el8_6.1RHSA-2023:3361

gnutls28Ubuntu

Fixed in:3.6.13-2ubuntu1.8USN-5901-1

Fixed in:3.7.3-4ubuntu1.2USN-5901-1

Fixed in:3.7.7-2ubuntu2.1USN-5901-1

libgnutls30Ubuntu

Fixed in:3.6.13-2ubuntu1.8USN-5901-1

Fixed in:3.7.3-4ubuntu1.2USN-5901-1

Fixed in:3.7.7-2ubuntu2.1USN-5901-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

1.40%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Patch1

github.com

Exploit1

gitlab.com

Third-Party Advisory3

Other references4

Related Vulnerabilities

Other CWE-203 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-5753	Medium	5.6	94%	-	Fix
CVE-2003-0190	Medium	5.0	77%	-	Fix
CVE-2017-5715	Medium	5.6	74%	-	Fix
CVE-2018-3639	Medium	5.5	61%	-	Fix
CVE-2023-28770	High	7.5	58%	-	Fix
CVE-2004-1602	Medium	5.0	31%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-03-19.