Is CVE-2023-2283 in the CISA KEV catalog?

No. CVE-2023-2283 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-2283?

CVE-2023-2283 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2023-2283?

CVE-2023-2283 has an EPSS score of 1.06% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-2283?

Upgrade libssh on debian 11 to 0.9.7-0+deb11u1 or later. Fixes are available for 13 affected products.

CVE & CISA-KEV Catalog

CVE-2023-2283

MEDIUM

6.5

CVSS v3

NVD

Description

A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.

CWE-287Improper Authentication

How to fix

Remediation Available

libsshDebian

Fixed in:0.9.7-0+deb11u1CVE-2023-2283

Fixed in:0.10.5-1CVE-2023-2283

libsshRocky

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libsshRed Hat / RHEL

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libssh-configRed Hat / RHEL

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libssh-configRocky

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libssh-debuginfoRed Hat / RHEL

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libssh-debuginfoRocky

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libssh-debugsourceRed Hat / RHEL

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libssh-debugsourceRocky

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libssh-develRocky

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libssh-develRed Hat / RHEL

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.9.6-4.el8_6RHSA-2024:0538

Fixed in:0:0.9.6-10.el8_8RHSA-2023:3839

Fixed in:0:0.10.4-11.el9RHSA-2023:6643

libsshUbuntu

Fixed in:0.9.3-2ubuntu2.3USN-6138-1

Fixed in:0.9.6-2ubuntu0.22.04.1USN-6138-1

Fixed in:0.9.6-2ubuntu0.22.10.1USN-6138-1

Fixed in:0.10.4-2ubuntu0.1USN-6138-1

libssh-4Ubuntu

Fixed in:0.9.3-2ubuntu2.3USN-6138-1

Fixed in:0.9.6-2ubuntu0.22.04.1USN-6138-1

Fixed in:0.9.6-2ubuntu0.22.10.1USN-6138-1

Fixed in:0.10.4-2ubuntu0.1USN-6138-1

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 ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.06%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Vendor Advisory1

libssh.org

Third-Party Advisory2

Other references5

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	Fix

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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 2025-11-03.