Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
NameCVE-2019-1547First vendor Publication2019-09-10
VendorCveLast vendor Modification2019-09-12

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:P/I:N/A:N)
Cvss Base Score1.9Attack RangeLocal
Cvss Impact Score2.9Attack ComplexityMedium
Cvss Expoit Score3.4AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

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).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1547

CWE : Common Weakness Enumeration

%idName
100 %CWE-311Missing Encryption of Sensitive Data (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application55

Sources (Detail)

SourceUrl
BUGTRAQ https://seclists.org/bugtraq/2019/Oct/0
https://seclists.org/bugtraq/2019/Oct/1
https://seclists.org/bugtraq/2019/Sep/25
CONFIRM https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=21c856b75d81eff6...
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30c22fa8b1d84003...
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=7c1709c2da5414f5...
https://security.netapp.com/advisory/ntap-20190919-0002/
https://support.f5.com/csp/article/K73422160?utm_source=f5support&utm...
https://www.openssl.org/news/secadv/20190910.txt
DEBIAN https://www.debian.org/security/2019/dsa-4539
https://www.debian.org/security/2019/dsa-4540
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
MISC http://packetstormsecurity.com/files/154467/Slackware-Security-Advisory-opens...
https://arxiv.org/abs/1909.01785
MLIST https://lists.debian.org/debian-lts-announce/2019/09/msg00026.html
SUSE http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00054.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00072.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00016.html

Alert History

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DateInformations
2019-10-10 12:11:20
  • Multiple Updates
2019-10-07 12:01:22
  • Multiple Updates
2019-10-03 12:11:01
  • Multiple Updates
2019-10-02 12:01:35
  • Multiple Updates
2019-09-26 12:11:14
  • Multiple Updates
2019-09-25 12:11:07
  • Multiple Updates
2019-09-25 01:10:50
  • Multiple Updates
2019-09-19 21:19:47
  • Multiple Updates
2019-09-12 21:19:59
  • Multiple Updates
2019-09-12 17:19:47
  • Multiple Updates
2019-09-12 05:18:48
  • Multiple Updates
2019-09-10 21:19:51
  • First insertion