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NVD / CVE Program· CNA openssl

CVE-2019-1551: rsaz_512_sqr overflow bug on x86_64

Noroxi assessment

Priority: Monitor (action score 25/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 14.2% (FIRST EPSS); higher than 96.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: openssl (Alpine:v3.10) 1.1.1d-r2; openssl (Alpine:v3.11) 1.1.1d-r3; openssl3 (Alpine:v3.15) 1.1.1d-r3.
  • Mentioned 5 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to openssl (Alpine:v3.10) 1.1.1d-r2; openssl (Alpine:v3.11) 1.1.1d-r3; openssl3 (Alpine:v3.15) 1.1.1d-r3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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).

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Dec 6, 2019
Updated
Oct 8, 2026
EPSS
14.2% · 96th percentile

Report tools

JSON

Action score

25

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
4 / 30 · 14.2%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
opensslopenssl
opensuseleap
oracleenterprise manager ops center
oraclemysql enterprise monitor
oraclepeoplesoft enterprise peopletools
canonicalubuntu linux
fedoraprojectfedora
debiandebian linux
tenablelog correlation engine

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux16.04
  • canonical ubuntu linux18.04
  • canonical ubuntu linux19.10
  • debian debian linux10.0
  • debian debian linux9.0
  • fedoraproject fedora30
  • fedoraproject fedora31
  • fedoraproject fedora32
  • openssl openssl1.0.2 and later · up to 1.0.2t inclusive
  • openssl openssl1.1.1 and later · up to 1.1.1d inclusive
  • opensuse leap15.1
  • oracle enterprise manager ops center12.4.0.0
  • oracle mysql enterprise monitor8.0.0 and later · up to 8.0.20 inclusive
  • oracle mysql enterprise monitorup to 4.0.12 inclusive
  • oracle peoplesoft enterprise peopletools8.56
  • oracle peoplesoft enterprise peopletools8.57
  • oracle peoplesoft enterprise peopletools8.58
  • tenable log correlation enginebefore 6.0.9

Versions reported by the vendor

Affected version ranges reported by the assigning authority (openssl). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenSSL OpenSSL

    • 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)affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.10opensslfrom 1.0.2 · before 1.1.1d-r21.1.1d-r2
Alpine:v3.11opensslfrom 1.0.2 · before 1.1.1d-r31.1.1d-r3
Alpine:v3.15openssl3before 1.1.1d-r31.1.1d-r3
Alpine:v3.17openssl1.1-compatbefore 1.1.1d-r31.1.1d-r3
Alpine:v3.8opensslfrom 1.0.2 · before 1.0.2u-r01.0.2u-r0
Debian:10opensslbefore 1.1.1d-0+deb10u51.1.1d-0+deb10u5
Debian:12opensslbefore 1.1.1e-11.1.1e-1
Debian:9opensslbefore 1.1.0l-1~deb9u51.1.0l-1~deb9u5
Debian:9openssl1.0before 1.0.2u-1~deb9u11.0.2u-1~deb9u1
openSUSE:Leap 15.1openssl-1_1before 1.1.0i-lp151.8.6.11.1.0i-lp151.8.6.1
Red Hat:enterprise_linux:8::baseosopensslbefore 1:1.1.1g-11.el81:1.1.1g-11.el8
Red Hat:enterprise_linux:8::baseosopenssl-debuginfobefore 1:1.1.1g-11.el81:1.1.1g-11.el8
Red Hat:enterprise_linux:8::baseosopenssl-debugsourcebefore 1:1.1.1g-11.el81:1.1.1g-11.el8
Red Hat:enterprise_linux:8::baseosopenssl-develbefore 1:1.1.1g-11.el81:1.1.1g-11.el8
Red Hat:enterprise_linux:8::baseosopenssl-libsbefore 1:1.1.1g-11.el81:1.1.1g-11.el8
Red Hat:enterprise_linux:8::baseosopenssl-libs-debuginfobefore 1:1.1.1g-11.el81:1.1.1g-11.el8
Red Hat:enterprise_linux:8::baseosopenssl-perlbefore 1:1.1.1g-11.el81:1.1.1g-11.el8
Red Hat:jboss_core_services:1::el6jbcs-httpd24-aprbefore 0:1.6.3-104.jbcs.el60:1.6.3-104.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-debuginfobefore 0:1.6.3-104.jbcs.el60:1.6.3-104.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-develbefore 0:1.6.3-104.jbcs.el60:1.6.3-104.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-utilbefore 0:1.6.1-75.jbcs.el60:1.6.1-75.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-debuginfobefore 0:1.6.1-75.jbcs.el60:1.6.1-75.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-develbefore 0:1.6.1-75.jbcs.el60:1.6.1-75.jbcs.el6
Red Hat:jboss_core_services:1::el6jbcs-httpd24-apr-util-ldapbefore 0:1.6.1-75.jbcs.el60:1.6.1-75.jbcs.el6

+96

Same product

openssl: all records

Other highest-scoring records for the same primary product.

  • CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remKEV
    90Now
  • CVE-2021-3711SM2 Decryption Buffer Overflow
    65This week
  • CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code
    65This week

Published before and after this one in the same product

  • ← EarlierCVE-2019-1549Sep 10, 2019 · OpenSSL 1.1.1 introduced a rewritten random number generator (RNG).
    23Monitor
  • ← EarlierCVE-2019-1563Sep 10, 2019 · Padding Oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey
    15Monitor
  • Later →CVE-2020-7041Feb 27, 2020 · An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL 1.0.2 or later.
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:openssl1.1.1d-r2 · Alpine:v3.10Package registry (OSV)
alpine:openssl1.1-compat1.1.1d-r3 · Alpine:v3.17Package registry (OSV)
alpine:openssl31.1.1d-r3 · Alpine:v3.15Package registry (OSV)
debian:openssl1.1.1e-1 · Debian:12Package registry (OSV)
debian:openssl1.01.0.2u-1~deb9u1 · Debian:9Package registry (OSV)
opensuse:openssl-1_11.1.0i-lp151.8.6.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:jbcs-httpd24-apr0:1.6.3-104.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-debuginfo0:1.6.3-104.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-devel0:1.6.3-104.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-debuginfo0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-devel0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-ldap0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-mysql0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-nss0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-odbc0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-openssl0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
red hat:jbcs-httpd24-apr-util-pgsql0:1.6.1-75.jbcs.el6 · Red Hat:jboss_core_services:1::el6Package registry (OSV)
suse:openssl1.0.2j-60.60.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)
suse:openssl-1_0_01.0.2p-3.14.1 · SUSE:Linux Enterprise Desktop 12 SP4Package registry (OSV)
suse:openssl-1_11.1.0i-4.27.1 · SUSE:Linux Enterprise Module for Basesystem 15Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records