4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
6.5 Medium
AI Score
Confidence
High
0.01 Low
EPSS
Percentile
83.9%
Issue Overview:
If an application encounters a fatal protocol error and then calls SSL_shutdown() twice (once to send a close_notify, and once to receive one) then OpenSSL can respond differently to the calling application if a 0 byte record is received with invalid padding compared to if a 0 byte record is received with an invalid MAC. If the application then behaves differently based on that in a way that is detectable to the remote peer, then this amounts to a padding oracle that could be used to decrypt data. In order for this to be exploitable “non-stitched” ciphersuites must be in use. Stitched ciphersuites are optimised implementations of certain commonly used ciphersuites. Also the application must call SSL_shutdown() twice even if a protocol error has occurred (applications should not do this but some do anyway). Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q). (CVE-2019-1559)
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). (CVE-2018-0734)
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:
aarch64:
openssl-1.0.2k-19.amzn2.0.1.aarch64
openssl-libs-1.0.2k-19.amzn2.0.1.aarch64
openssl-devel-1.0.2k-19.amzn2.0.1.aarch64
openssl-static-1.0.2k-19.amzn2.0.1.aarch64
openssl-perl-1.0.2k-19.amzn2.0.1.aarch64
openssl-debuginfo-1.0.2k-19.amzn2.0.1.aarch64
i686:
openssl-1.0.2k-19.amzn2.0.1.i686
openssl-libs-1.0.2k-19.amzn2.0.1.i686
openssl-devel-1.0.2k-19.amzn2.0.1.i686
openssl-static-1.0.2k-19.amzn2.0.1.i686
openssl-perl-1.0.2k-19.amzn2.0.1.i686
openssl-debuginfo-1.0.2k-19.amzn2.0.1.i686
src:
openssl-1.0.2k-19.amzn2.0.1.src
x86_64:
openssl-1.0.2k-19.amzn2.0.1.x86_64
openssl-libs-1.0.2k-19.amzn2.0.1.x86_64
openssl-devel-1.0.2k-19.amzn2.0.1.x86_64
openssl-static-1.0.2k-19.amzn2.0.1.x86_64
openssl-perl-1.0.2k-19.amzn2.0.1.x86_64
openssl-debuginfo-1.0.2k-19.amzn2.0.1.x86_64
Red Hat: CVE-2018-0734, CVE-2019-1559
Mitre: CVE-2018-0734, CVE-2019-1559
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | openssl | < 1.0.2k-19.amzn2.0.1 | openssl-1.0.2k-19.amzn2.0.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | openssl-libs | < 1.0.2k-19.amzn2.0.1 | openssl-libs-1.0.2k-19.amzn2.0.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | openssl-devel | < 1.0.2k-19.amzn2.0.1 | openssl-devel-1.0.2k-19.amzn2.0.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | openssl-static | < 1.0.2k-19.amzn2.0.1 | openssl-static-1.0.2k-19.amzn2.0.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | openssl-perl | < 1.0.2k-19.amzn2.0.1 | openssl-perl-1.0.2k-19.amzn2.0.1.aarch64.rpm |
Amazon Linux | 2 | aarch64 | openssl-debuginfo | < 1.0.2k-19.amzn2.0.1 | openssl-debuginfo-1.0.2k-19.amzn2.0.1.aarch64.rpm |
Amazon Linux | 2 | i686 | openssl | < 1.0.2k-19.amzn2.0.1 | openssl-1.0.2k-19.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | openssl-libs | < 1.0.2k-19.amzn2.0.1 | openssl-libs-1.0.2k-19.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | openssl-devel | < 1.0.2k-19.amzn2.0.1 | openssl-devel-1.0.2k-19.amzn2.0.1.i686.rpm |
Amazon Linux | 2 | i686 | openssl-static | < 1.0.2k-19.amzn2.0.1 | openssl-static-1.0.2k-19.amzn2.0.1.i686.rpm |
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
6.5 Medium
AI Score
Confidence
High
0.01 Low
EPSS
Percentile
83.9%