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Vulnerability Details : CVE-2019-1547

Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).
Publish Date : 2019-09-10 Last Update Date : 2021-07-31
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- CVSS Scores & Vulnerability Types

CVSS Score
1.9
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID CWE id is not defined for this vulnerability

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2020:1840: openssl security and bug fix update (Moderate) oval:com.redhat.rhsa:def:20201840 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2019-1547

# Product Type Vendor Product Version Update Edition Language
1 Application Openssl Openssl * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Openssl Openssl 1

- References For CVE-2019-1547

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=7c1709c2da5414f5b6133d00a03fc8c5bf996c7a CONFIRM
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30c22fa8b1d840036b8e203585738df62a03cec8 CONFIRM
https://www.openssl.org/news/secadv/20190910.txt CONFIRM
https://www.oracle.com/security-alerts/cpuoct2020.html
https://usn.ubuntu.com/4504-1/
UBUNTU USN-4504-1
https://usn.ubuntu.com/4376-2/
UBUNTU USN-4376-2
https://kc.mcafee.com/corporate/index?page=content&id=SB10365 CONFIRM
https://security.netapp.com/advisory/ntap-20200416-0003/ CONFIRM
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.oracle.com/security-alerts/cpuapr2020.html
N/A N/A
https://usn.ubuntu.com/4376-1/
UBUNTU USN-4376-1
https://security.netapp.com/advisory/ntap-20200122-0002/ CONFIRM
https://www.oracle.com/security-alerts/cpujan2020.html
https://www.tenable.com/security/tns-2019-09 CONFIRM
https://www.tenable.com/security/tns-2019-08 CONFIRM
https://seclists.org/bugtraq/2019/Oct/0
BUGTRAQ 20191001 [SECURITY] [DSA 4540-1] openssl1.0 security update
https://www.debian.org/security/2019/dsa-4539
DEBIAN DSA-4539
https://www.debian.org/security/2019/dsa-4540
DEBIAN DSA-4540
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00012.html
SUSE openSUSE-SU-2019:2268
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00016.html
SUSE openSUSE-SU-2019:2269
https://support.f5.com/csp/article/K73422160?utm_source=f5support&utm_medium=RSS CONFIRM
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://security.gentoo.org/glsa/201911-04
GENTOO GLSA-201911-04
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00072.html
SUSE openSUSE-SU-2019:2189
https://lists.debian.org/debian-lts-announce/2019/09/msg00026.html
MLIST [debian-lts-announce] 20190925 [SECURITY] [DLA 1932-1] openssl security update
https://lists.fedoraproject.org/archives/list/[email protected]/message/ZN4VVQJ3JDCHGIHV4Y2YTXBYQZ6PWQ7E/
FEDORA FEDORA-2019-d51641f152
https://seclists.org/bugtraq/2019/Oct/1
BUGTRAQ 20191001 [SECURITY] [DSA 4539-1] openssl security update
https://security.netapp.com/advisory/ntap-20190919-0002/ CONFIRM
https://lists.fedoraproject.org/archives/list/[email protected]/message/GY6SNRJP2S7Y42GIIDO3HXPNMDYN2U3A/
FEDORA FEDORA-2019-d15aac6c4e
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00054.html
SUSE openSUSE-SU-2019:2158
http://packetstormsecurity.com/files/154467/Slackware-Security-Advisory-openssl-Updates.html
https://seclists.org/bugtraq/2019/Sep/25
BUGTRAQ 20190912 [slackware-security] openssl (SSA:2019-254-03)
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=21c856b75d81eff61aa63b4f036bb64a85bf6d46 CONFIRM
https://arxiv.org/abs/1909.01785

- Metasploit Modules Related To CVE-2019-1547

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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