CVE-2019-1547: ECDSA remote timing attack

Published Sep 10, 2019
·
Updated

ECDSA remote timing attack

Other sources

Normally in OpenSSL EC groups always have a co-factor present and this ...

— Debian

OpenSSL could allow a local authenticated attacker to obtain sensitive information, caused by the ability to construct an EC group missing the cofactor using explicit parameters instead of using a named curve. An attacker could exploit this vulnerability to obtain full key recovery during an ECDSA signature operation.

— IBM

Affected Software

14 affected componentsFixes available
redhat/jbcs-httpd24-apr<0:1.6.3-86.jbcs.el6
0:1.6.3-86.jbcs.el6
redhat/jbcs-httpd24-brotli<0:1.0.6-21.jbcs.el6
0:1.0.6-21.jbcs.el6
redhat/jbcs-httpd24-httpd<0:2.4.37-52.jbcs.el6
0:2.4.37-52.jbcs.el6
redhat/jbcs-httpd24-openssl<1:1.1.1c-16.jbcs.el6
1:1.1.1c-16.jbcs.el6
redhat/jbcs-httpd24-apr<0:1.6.3-86.jbcs.el7
0:1.6.3-86.jbcs.el7
redhat/jbcs-httpd24-brotli<0:1.0.6-21.jbcs.el7
0:1.0.6-21.jbcs.el7
redhat/jbcs-httpd24-httpd<0:2.4.37-52.jbcs.el7
0:2.4.37-52.jbcs.el7
redhat/jbcs-httpd24-openssl<1:1.1.1c-16.jbcs.el7
1:1.1.1c-16.jbcs.el7
redhat/openssl<1:1.1.1c-15.el8
1:1.1.1c-15.el8
OpenSSL OpenSSL>=1.0.2<=1.0.2s
OpenSSL OpenSSL>=1.1.0<=1.1.0k
OpenSSL OpenSSL>=1.1.1<=1.1.1c
IBM Security Verify Governance<=10.0
debian/openssl
1.1.1w-0+deb11u11.1.1w-0+deb11u83.0.20-1~deb12u13.0.20-1~deb12u23.5.6-1~deb13u13.5.6-1~deb13u23.6.3-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/jbcs-httpd24-apr to a version that resolves this vulnerability.

    Fixed in 0:1.6.3-86.jbcs.el6
  2. Upgrade

    Upgrade redhat/jbcs-httpd24-brotli to a version that resolves this vulnerability.

    Fixed in 0:1.0.6-21.jbcs.el6
  3. Upgrade

    Upgrade redhat/jbcs-httpd24-httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.37-52.jbcs.el6
  4. Upgrade

    Upgrade redhat/jbcs-httpd24-openssl to a version that resolves this vulnerability.

    Fixed in 1:1.1.1c-16.jbcs.el6
  5. Upgrade

    Upgrade redhat/jbcs-httpd24-apr to a version that resolves this vulnerability.

    Fixed in 0:1.6.3-86.jbcs.el7
  6. Upgrade

    Upgrade redhat/jbcs-httpd24-brotli to a version that resolves this vulnerability.

    Fixed in 0:1.0.6-21.jbcs.el7
  7. Upgrade

    Upgrade redhat/jbcs-httpd24-httpd to a version that resolves this vulnerability.

    Fixed in 0:2.4.37-52.jbcs.el7
  8. Upgrade

    Upgrade redhat/jbcs-httpd24-openssl to a version that resolves this vulnerability.

    Fixed in 1:1.1.1c-16.jbcs.el7
  9. Upgrade

    Upgrade redhat/openssl to a version that resolves this vulnerability.

    Fixed in 1:1.1.1c-15.el8
  10. Upgrade

    Upgrade debian/openssl to a version that resolves this vulnerability.

    Fixed in 1.1.1w-0+deb11u1Fixed in 1.1.1w-0+deb11u8Fixed in 3.0.20-1~deb12u1Fixed in 3.0.20-1~deb12u2Fixed in 3.5.6-1~deb13u1Fixed in 3.5.6-1~deb13u2Fixed in 3.6.3-1
  11. Upgrade

    Upgrade OpenSSL to a version that resolves this vulnerability.

    Fixed in 1.1.1d
  12. Upgrade

    Upgrade OpenSSL to a version that resolves this vulnerability.

    Fixed in 1.1.0l
  13. Upgrade

    Upgrade OpenSSL to a version that resolves this vulnerability.

    Fixed in 1.0.2t
  14. Upgrade

    Upgrade debian/openssl to a version that resolves this vulnerability.

    Fixed in 1.1.1w-0+deb11u1
  15. Upgrade

    Upgrade debian/openssl to a version that resolves this vulnerability.

    Fixed in 1.1.1w-0+deb11u8
  16. Upgrade

    Upgrade debian/openssl to a version that resolves this vulnerability.

    Fixed in 3.0.20-1~deb12u1
  17. Upgrade

    Upgrade debian/openssl to a version that resolves this vulnerability.

    Fixed in 3.0.20-1~deb12u2
  18. Upgrade

    Upgrade debian/openssl to a version that resolves this vulnerability.

    Fixed in 3.5.6-1~deb13u1
  19. Upgrade

    Upgrade debian/openssl to a version that resolves this vulnerability.

    Fixed in 3.5.6-1~deb13u2
  20. Upgrade

    Upgrade debian/openssl to a version that resolves this vulnerability.

    Fixed in 3.6.3-1
  21. Configuration

    Ensure EC groups are created using named curves rather than explicit EC parameters so the co-factor is present and OpenSSL uses side-channel resistant code paths.

    libcrypto / EC group construction use_named_curves (avoid explicit parameters) = true
  22. Compensating control

    Restrict, authenticate, and rate-limit access to services that perform ECDSA signature operations and monitor for abnormal signing request volumes to prevent an attacker from timing a large number of signature creations.

Event History

Sep 10, 2019
CVE Published
12:00 AM
CVE Published
via MITRE·04:58 PM
Data Sourced
via MITRE·04:58 PM
DescriptionWeakness
Sep 13, 2019
Data Sourced
via Red Hat·05:03 PM
DescriptionSeverityAffected Software
Sep 4, 2025
Data Sourced
via Microsoft·12:10 AM
DescriptionSeverityWeakness
Feb 23, 2026
Data Sourced
via Ubuntu·02:43 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Launchpad·02:43 PM
Description
Jun 17, 2026
Data Sourced
via Debian·01:27 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the vulnerability ID?

The vulnerability ID is CVE-2019-1547.

2

What is the severity of CVE-2019-1547?

The severity of CVE-2019-1547 is medium with a severity value of 5.5.

3

What is the affected software for CVE-2019-1547?

The affected software for CVE-2019-1547 includes jbcs-httpd24-apr, jbcs-httpd24-brotli, jbcs-httpd24-httpd, and jbcs-httpd24-openssl.

4

How can I fix CVE-2019-1547?

To fix CVE-2019-1547, update to the latest version of the affected software.

5

Where can I find more information about CVE-2019-1547?

You can find more information about CVE-2019-1547 at the following references: https://arxiv.org/abs/1909.01785, https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=21c856b75d81eff61aa63b4f036bb64a85bf6d46, and https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30c22fa8b1d840036b8e203585738df62a03cec8.

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