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Fencer Intel
medium 5.3

CVE-2019-1551 json

rsaz_512_sqr overflow bug on x86_64

published 6y ago modified last mo. also EUVD-2019-10108 , GHSA-fcc6-m5v9-xcgq , JLSEC-2026-216

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
14.3%
EPSS 14.3% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

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).

Patch / fix

  • julia OpenSSL_jll 1.1.1+2
  • julia Openresty_jll 1.19.9+0
  • tenable log_correlation_engine 6.0.9
  • openssl Debian 14, Debian 13, Debian 12 1.1.1e-1

debian advisories DEBIAN-CVE-2019-1551

  • openssl Ubuntu 16.04 LTS 1.0.2g-1ubuntu4.16
  • openssl Ubuntu 18.04 LTS 1.1.1-1ubuntu2.1~18.04.6
  • openssl Ubuntu 20.04 LTS 1.1.1f-1ubuntu1
  • openssl1.0 Ubuntu 18.04 LTS 1.0.2n-1ubuntu5.4

ubuntu advisories UBUNTU-CVE-2019-1551

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • jbcs-httpd24-apr jboss core services 1 1.6.3-104.jbcs.el6
  • jbcs-httpd24-apr jboss core services 1 1.6.3-104.jbcs.el7
  • jbcs-httpd24-curl jboss core services 1 7.64.1-44.jbcs.el6
  • jbcs-httpd24-curl jboss core services 1 7.64.1-44.jbcs.el7
  • jbcs-httpd24-httpd jboss core services 1 2.4.37-64.jbcs.el6
  • jbcs-httpd24-httpd jboss core services 1 2.4.37-64.jbcs.el7
  • jbcs-httpd24-brotli jboss core services 1 1.0.6-38.jbcs.el6
  • jbcs-httpd24-brotli jboss core services 1 1.0.6-38.jbcs.el7

red hat advisories RHSA-2020:4384RHSA-2020:4514

  • openssl SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES 12 SP3-LTSS +8 more 1.0.2j-60.60.1
  • openssl-1_1 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +4 more 1.1.1d-2.20.1
  • openssl-1_1 SLE Module for Basesystem 15 SP1 1.1.0i-14.6.1
  • openssl-1_0_0 SLE Module for Legacy 15 SP1, SLE Module for Legacy 15, Enterprise Storage 6 1.0.2p-3.25.1
  • openssl-1_0_0 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +4 more 1.0.2p-3.14.1
  • openssl-1_1 SLE Module for Basesystem 15 1.1.0i-4.27.1

suse advisories SUSE-SU-2020:0474-1SUSE-SU-2020:0099-1SUSE-SU-2020:0069-1SUSE-SU-2020:0064-1SUSE-SU-2020:0028-1SUSE-SU-2020:0002-1

  • openssl-1_0_0 openSUSE Tumbleweed 1.0.2u-6.2
  • openssl-1_1 openSUSE Tumbleweed 1.1.1l-1.2
  • openssl-1_1 openSUSE Leap 15.1 1.1.0i-lp151.8.6.1

opensuse advisories openSUSE-SU-2024:11126-1openSUSE-SU-2024:11127-1openSUSE-SU-2020:0062-1

  • openssl Alpine 3.10, Alpine 3.9 1.1.1d-r2
  • openssl Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 1.1.1d-r3
  • openssl Alpine 3.8 1.0.2u-r0
  • openssl3 Alpine 3.16, Alpine 3.15 1.1.1d-r3
  • openssl1.1-compat Alpine 3.18, Alpine 3.17 1.1.1d-r3

alpine advisories ALPINE-CVE-2019-1551

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2019-1551 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-1551 updated cvss 4.8

openssl: Integer overflow in RSAZ modular exponentiation on x86_64

  • Red Hat Enterprise Linux 7 openssl, openssl-libs, openssl-perl Red Hat Enterprise Linux 8 compat-openssl10
    affected: workaround, no fix available “Fix deferred”
  • Red Hat JBoss Enterprise Application Platform 6 openssl Red Hat JBoss Enterprise Web Server 2 openssl
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux BaseOS (v. 8) openssl 1.1.1g-11.el8, openssl-libs 1.1.1g-11.el8, openssl-perl 1.1.1g-11.el8
    fixed: vendor fix RHSA-2020:4514
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2020:4383
  • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr 1.6.3-104.jbcs.el6, jbcs-httpd24-curl 7.64.1-44.jbcs.el6, jbcs-httpd24-brotli 1.0.6-38.jbcs.el6, jbcs-httpd24-httpd 2.4.37-64.jbcs.el6, jbcs-httpd24-jansson 2.11-53.jbcs.el6, jbcs-httpd24-mod_md 2.0.8-30.jbcs.el6, +26 more Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr 1.6.3-104.jbcs.el7, jbcs-httpd24-curl 7.64.1-44.jbcs.el7, jbcs-httpd24-brotli 1.0.6-38.jbcs.el7, jbcs-httpd24-httpd 2.4.37-64.jbcs.el7, jbcs-httpd24-jansson 2.11-53.jbcs.el7, jbcs-httpd24-mod_md 2.0.8-30.jbcs.el7, +27 more
    fixed: vendor fix RHSA-2020:4384
  • Red Hat Enterprise Linux 5 openssl, openssl097a Red Hat Enterprise Linux 6 openssl, openssl098e, openssl-perl Red Hat Enterprise Linux 7 openssl098e
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last mo.

Exploit prediction

14.30% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
julia OpenSSL_jll
<1.1.1+2
1.1.1+2
julia Openresty_jll
<1.19.9+0
1.19.9+0

Affected products

  • OpenSSL OpenSSL

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.