7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5 Medium
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.05 Low
EPSS
Percentile
92.7%
Issue Overview:
During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack.(CVE-2018-0732)
Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.(CVE-2018-0495)
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe.(CVE-2018-0739)
While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006.(CVE-2017-3735)
Affected Packages:
openssl
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update openssl to update your system.
New Packages:
i686:
openssl-1.0.2k-16.amzn2.0.1.i686
openssl-libs-1.0.2k-16.amzn2.0.1.i686
openssl-devel-1.0.2k-16.amzn2.0.1.i686
openssl-static-1.0.2k-16.amzn2.0.1.i686
openssl-perl-1.0.2k-16.amzn2.0.1.i686
openssl-debuginfo-1.0.2k-16.amzn2.0.1.i686
src:
openssl-1.0.2k-16.amzn2.0.1.src
x86_64:
openssl-1.0.2k-16.amzn2.0.1.x86_64
openssl-libs-1.0.2k-16.amzn2.0.1.x86_64
openssl-devel-1.0.2k-16.amzn2.0.1.x86_64
openssl-static-1.0.2k-16.amzn2.0.1.x86_64
openssl-perl-1.0.2k-16.amzn2.0.1.x86_64
openssl-debuginfo-1.0.2k-16.amzn2.0.1.x86_64
Red Hat: CVE-2017-3735, CVE-2018-0495, CVE-2018-0732, CVE-2018-0739
Mitre: CVE-2017-3735, CVE-2018-0495, CVE-2018-0732, CVE-2018-0739
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | i686 | openssl | < 1.0.2k-16.amzn2.0.1 | openssl-1.0.2k-16.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | openssl-libs | < 1.0.2k-16.amzn2.0.1 | openssl-libs-1.0.2k-16.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | openssl-devel | < 1.0.2k-16.amzn2.0.1 | openssl-devel-1.0.2k-16.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | openssl-static | < 1.0.2k-16.amzn2.0.1 | openssl-static-1.0.2k-16.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | openssl-perl | < 1.0.2k-16.amzn2.0.1 | openssl-perl-1.0.2k-16.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | openssl-debuginfo | < 1.0.2k-16.amzn2.0.1 | openssl-debuginfo-1.0.2k-16.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | x86_64 | openssl | < 1.0.2k-16.amzn2.0.1 | openssl-1.0.2k-16.amzn2.0.1.x86_64.rpm |
Amazon Linux | 2 | x86_64 | openssl-libs | < 1.0.2k-16.amzn2.0.1 | openssl-libs-1.0.2k-16.amzn2.0.1.x86_64.rpm |
Amazon Linux | 2 | x86_64 | openssl-devel | < 1.0.2k-16.amzn2.0.1 | openssl-devel-1.0.2k-16.amzn2.0.1.x86_64.rpm |
Amazon Linux | 2 | x86_64 | openssl-static | < 1.0.2k-16.amzn2.0.1 | openssl-static-1.0.2k-16.amzn2.0.1.x86_64.rpm |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5 Medium
AI Score
Confidence
High
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.05 Low
EPSS
Percentile
92.7%