Is CVE-2019-1551 in the CISA KEV catalog?

No. CVE-2019-1551 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-1551?

CVE-2019-1551 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2019-1551?

CVE-2019-1551 has an EPSS score of 14.30% (96th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-1551?

Upgrade openssl on debian 11 to 1.1.1e-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2019-1551

MEDIUMEPSS 96th pctl

5.3

CVSS v3

NVD

Description

There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).

CWE-190Integer Overflow

How to fix

Remediation Available

opensslDebian

Fixed in:1.1.1e-1CVE-2019-1551

libssl1.0.0Ubuntu

Fixed in:1.0.2g-1ubuntu4.17USN-4504-1

Fixed in:1.0.2g-1ubuntu4.16USN-4376-1

Fixed in:1.0.2n-1ubuntu5.4USN-4504-1

libssl1.1Ubuntu

Fixed in:1.1.1-1ubuntu2.1~18.04.6USN-4376-1

opensslUbuntu

Fixed in:1.0.2g-1ubuntu4.17USN-4504-1

Fixed in:1.0.2g-1ubuntu4.16USN-4376-1

Fixed in:1.1.1-1ubuntu2.1~18.04.6USN-4376-1

openssl1.0Ubuntu

Fixed in:1.0.2n-1ubuntu5.4USN-4504-1

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

14.30%probability of exploitation in 30 days

96thpercentile

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

References

Patch3

Vendor Advisory1

openssl.org

Third-Party Advisory15

Other references5

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	90%	-	-
CVE-2017-3599	High	7.5	90%	-	Fix
CVE-2023-21716	Critical	9.8	82%	-	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.