medium
5.9
CWE
327 385
Advisory Published
CVE Published
Updated

CVE-2018-0735: Timing attack against ECDSA signature generation

First published: Thu Oct 25 2018(Updated: )

A flaw was found in OpenSSL versions from 1.1.0 through 1.1.0i inclusive and version 1.1.1. The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. References: <a href="https://www.openssl.org/news/secadv/20181029.txt">https://www.openssl.org/news/secadv/20181029.txt</a> Upstream Patch: <a href="https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=56fb454d281a023b3f950d969693553d3f3ceea1">https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=56fb454d281a023b3f950d969693553d3f3ceea1</a> <a href="https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=b1d6d55ece1c26fa2829e2b819b038d7b6d692b4">https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=b1d6d55ece1c26fa2829e2b819b038d7b6d692b4</a>

Credit: openssl-security@openssl.org

Affected SoftwareAffected VersionHow to fix
redhat/openssl<1:1.0.2k-16.el7_6.1
1:1.0.2k-16.el7_6.1
redhat/openssl<1:1.1.1c-2.el8
1:1.1.1c-2.el8
redhat/openssl<1.1.0
1.1.0
redhat/openssl<1.1.1
1.1.1
debian/openssl
1.1.1w-0+deb11u1
1.1.1n-0+deb11u5
3.0.14-1~deb12u1
3.0.14-1~deb12u2
3.3.2-1
OpenSSL>=1.1.0<=1.1.0i
OpenSSL=1.1.1
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=18.10
Debian=8.0
Debian=9.0
Node.js>=10.0.0<10.12.0
Node.js>=11.0.0<11.3.0
Node.js=10.13.0
All of
NetApp CN1610
NetApp CN1610 Firmware
NetApp Cloud Backup
NetApp Element OS
NetApp OnCommand Unified Manager for Windows
NetApp OnCommand Unified Manager for vSphere>=9.4
NetApp SANtricity SMI-S Provider Firmware
NetApp SMI-S Provider
NetApp SnapDrive for Unix
NetApp SnapDrive for Windows
NetApp SteelStore Cloud Integrated Storage
Oracle API Gateway=11.1.2.4.0
Oracle Java System Application Server=0.9.8
Oracle Java System Application Server=1.0.0
Oracle Java System Application Server=1.0.1
Oracle Enterprise Manager=12.1.0.5.0
Oracle Enterprise Manager=13.2.0.0.0
Oracle Enterprise Manager=13.3.0.0.0
Oracle Enterprise Manager Ops Center=12.3.3
Oracle MySQL<=5.6.42
Oracle MySQL>=5.7.0<=5.7.24
Oracle MySQL>=8.0.0<=8.0.13
Oracle Peoplesoft Enterprise Campus Software Campus Community=8.55
Oracle Peoplesoft Enterprise Campus Software Campus Community=8.56
Oracle Peoplesoft Enterprise Campus Software Campus Community=8.57
Oracle Primavera P6 Enterprise Project Portfolio Management>=17.7<=17.12
Oracle Primavera P6 Enterprise Project Portfolio Management=8.4
Oracle Primavera P6 Enterprise Project Portfolio Management=15.1
Oracle Primavera P6 Enterprise Project Portfolio Management=15.2
Oracle Primavera P6 Enterprise Project Portfolio Management=16.1
Oracle Primavera P6 Enterprise Project Portfolio Management=16.2
Oracle Primavera P6 Enterprise Project Portfolio Management=18.8
Tarantella Secure Global Desktop=5.4
Oracle Tuxedo=12.1.1.0.0
Oracle VirtualBox<6.0.0
Oracle VirtualBox>=5.0.0<5.2.24
NetApp CN1610
NetApp CN1610 Firmware

Remedy

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=56fb454d281a023b3f950d969693553d3f3ceea1

Remedy

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=b1d6d55ece1c26fa2829e2b819b038d7b6d692b4

Remedy

https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

Remedy

https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html

Remedy

https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2018-0735?

    CVE-2018-0735 has been classified with a high severity level due to its potential to allow attackers to recover private keys through a timing side channel attack.

  • How do I fix CVE-2018-0735?

    To remediate CVE-2018-0735, update OpenSSL to a version that is not vulnerable, such as 1:1.0.2k-16.el7_6.1 or 1.1.1c-2.el8.

  • Which versions of OpenSSL are affected by CVE-2018-0735?

    CVE-2018-0735 affects OpenSSL versions from 1.1.0 to 1.1.0i inclusive, and version 1.1.1.

  • Can CVE-2018-0735 be exploited remotely?

    Yes, CVE-2018-0735 can potentially be exploited remotely if an attacker can observe the timing of ECDSA signatures.

  • What types of systems are likely affected by CVE-2018-0735?

    Systems using OpenSSL versions 1.1.0 through 1.1.0i and 1.1.1, including many Linux distributions like Red Hat and Ubuntu, are likely affected by CVE-2018-0735.

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