Is CVE-2019-13115 in the CISA KEV catalog?

No. CVE-2019-13115 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-13115?

CVE-2019-13115 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2019-13115?

CVE-2019-13115 has an EPSS score of 11.66% (96th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-13115?

Upgrade libssh2 on debian 11 to 1.9.0-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2019-13115

HIGHEPSS 96th pctl

8.1

CVSS v3

NVD

Description

In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.

CWE-125Out-of-bounds Read CWE-190Integer Overflow

How to fix

Remediation Available

libssh2Debian

Fixed in:1.9.0-1CVE-2019-13115

libssh2Ubuntu

Fixed in:1.5.0-2ubuntu0.1+esm1USN-5308-1

libssh2-1Ubuntu

Fixed in:1.5.0-2ubuntu0.1+esm1USN-5308-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

11.66%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

Exploit1

blog.semmle.com

Vendor Advisory1

libssh2.org

Third-Party Advisory6

Other references7

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix
CVE-2023-49285	High	8.6	89%	-	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 2024-11-21.