CVE-2018-0734

Timing attack against DSA

Description

The OpenSSL DSA 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. Fixed in OpenSSL 1.1.1a (Affected 1.1.1). Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p).

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 6.05% Top 10%
Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory openssl.org
Affected: OpenSSL OpenSSL
Published at:
Updated at:

References

Link Tags
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html third party advisory patch
https://usn.ubuntu.com/3840-1/ third party advisory vendor advisory
https://www.debian.org/security/2018/dsa-4355 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20181105-0002/ third party advisory
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=8abfe72e8c1de1b95f50aa0d9134803b4d00070f
https://www.tenable.com/security/tns-2018-17 third party advisory
https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/ third party advisory
https://www.tenable.com/security/tns-2018-16 third party advisory
http://www.securityfocus.com/bid/105758 vdb entry third party advisory
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ef11e19d1365eea2b1851e6f540a0bf365d303e7
https://www.debian.org/security/2018/dsa-4348 third party advisory vendor advisory
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=43e6a58d4991a451daf4891ff05a48735df871ac
https://www.openssl.org/news/secadv/20181030.txt vendor advisory
https://security.netapp.com/advisory/ntap-20190118-0002/ third party advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html third party advisory patch
https://security.netapp.com/advisory/ntap-20190423-0002/ third party advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00030.html mailing list third party advisory vendor advisory
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html third party advisory patch
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00056.html mailing list third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:2304 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/ vendor advisory
https://access.redhat.com/errata/RHSA-2019:3700 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3933 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3935 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3932 third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpujan2020.html third party advisory
https://www.oracle.com/security-alerts/cpuapr2020.html third party advisory

Frequently Asked Questions

What is the severity of CVE-2018-0734?
CVE-2018-0734 has been scored as a medium severity vulnerability.
How to fix CVE-2018-0734?
To fix CVE-2018-0734, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-0734 being actively exploited in the wild?
It is possible that CVE-2018-0734 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-0734?
CVE-2018-0734 affects OpenSSL OpenSSL.
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