6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:P/A:N
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
0.105 Low
EPSS
Percentile
95.0%
Issue Overview:
During certificate verfification, OpenSSL (starting from version 1.0.1n and 1.0.2b) will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain checks on untrusted certificates to be bypassed, such as the CA flag, enabling them to use a valid leaf certificate to act as a CA and “issue” an invalid certificate.
This issue will impact any application that verifies certificates including SSL/TLS/DTLS clients and SSL/TLS/DTLS servers using client authentication.
The only version of OpenSSL from the Amazon Linux AMI that is impacted by this CVE is openssl-1.0.1k-10.86.amzn1, which was published as ALAS-2015-550 (https://alas.aws.amazon.com/ALAS-2015-550.html).
Affected Packages:
openssl
Issue Correction:
Run yum update openssl to update your system. Note that you may need to run yum clean all first.
New Packages:
i686:
openssl-1.0.1k-10.87.amzn1.i686
openssl-perl-1.0.1k-10.87.amzn1.i686
openssl-devel-1.0.1k-10.87.amzn1.i686
openssl-static-1.0.1k-10.87.amzn1.i686
openssl-debuginfo-1.0.1k-10.87.amzn1.i686
src:
openssl-1.0.1k-10.87.amzn1.src
x86_64:
openssl-devel-1.0.1k-10.87.amzn1.x86_64
openssl-debuginfo-1.0.1k-10.87.amzn1.x86_64
openssl-perl-1.0.1k-10.87.amzn1.x86_64
openssl-static-1.0.1k-10.87.amzn1.x86_64
openssl-1.0.1k-10.87.amzn1.x86_64
Red Hat: CVE-2015-1793
Mitre: CVE-2015-1793
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | openssl | < 1.0.1k-10.87.amzn1 | openssl-1.0.1k-10.87.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | openssl-perl | < 1.0.1k-10.87.amzn1 | openssl-perl-1.0.1k-10.87.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | openssl-devel | < 1.0.1k-10.87.amzn1 | openssl-devel-1.0.1k-10.87.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | openssl-static | < 1.0.1k-10.87.amzn1 | openssl-static-1.0.1k-10.87.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | openssl-debuginfo | < 1.0.1k-10.87.amzn1 | openssl-debuginfo-1.0.1k-10.87.amzn1.i686.rpm |
Amazon Linux | 1 | x86_64 | openssl-devel | < 1.0.1k-10.87.amzn1 | openssl-devel-1.0.1k-10.87.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | openssl-debuginfo | < 1.0.1k-10.87.amzn1 | openssl-debuginfo-1.0.1k-10.87.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | openssl-perl | < 1.0.1k-10.87.amzn1 | openssl-perl-1.0.1k-10.87.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | openssl-static | < 1.0.1k-10.87.amzn1 | openssl-static-1.0.1k-10.87.amzn1.x86_64.rpm |
Amazon Linux | 1 | x86_64 | openssl | < 1.0.1k-10.87.amzn1 | openssl-1.0.1k-10.87.amzn1.x86_64.rpm |
6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:P/A:N
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
0.105 Low
EPSS
Percentile
95.0%