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Mend.io Vulnerability Database

CVE-2019-1559

Date: February 27, 2019

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).

Language: Python

Severity Score

5.9

Related Resources (41)

Url: https://support.f5.com/csp/article/K18549143?utm_source=f5support&%3Butm_medium=RSS

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/

Url: https://access.redhat.com/errata/RHSA-2019:3931

Url: https://lists.debian.org/debian-lts-announce/2019/03/msg00003.html

Url: https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

Url: https://access.redhat.com/errata/RHSA-2019:2304

Url: https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

Url: http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00080.html

Url: https://security-tracker.debian.org/tracker/CVE-2019-1559

Url: http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00019.html

Url: http://www.securityfocus.com/bid/107174

Url: https://www.oracle.com/security-alerts/cpujan2021.html

Url: https://security.gentoo.org/glsa/201903-10

Url: https://www.debian.org/security/2019/dsa-4400

Url: https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

Url: https://security.netapp.com/advisory/ntap-20190301-0002/

Url: https://support.f5.com/csp/article/K18549143

Url: https://www.tenable.com/security/tns-2019-02

Url: http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00047.html

Url: https://access.redhat.com/errata/RHSA-2019:2439

Url: https://www.tenable.com/security/tns-2019-03

Url: https://access.redhat.com/errata/RHSA-2019:3929

Url: https://access.redhat.com/errata/RHSA-2019:2437

Url: http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00049.html

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/

Url: https://usn.ubuntu.com/3899-1/

Url: http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00041.html

Url: https://kc.mcafee.com/corporate/index?page=content&id=SB10282

Url: https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=e9bbefbf0f24c57645e7ad6a5a71ae649d18ac8e

Url: https://access.redhat.com/errata/RHSA-2019:2471

Url: http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00046.html

Url: https://access.redhat.com/security/cve/CVE-2019-1559

Url: https://security.netapp.com/advisory/ntap-20190423-0002/

Url: https://security.alpinelinux.org/vuln/CVE-2019-1559

Url: https://nvd.nist.gov/vuln/detail/CVE-2019-1559

Url: https://security.netapp.com/advisory/ntap-20190301-0001/

Url: https://www.oracle.com/security-alerts/cpujan2020.html

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/

Url: https://www.openssl.org/news/secadv/20190226.txt

Url: https://usn.ubuntu.com/4376-2/

Url: https://www.mend.io/vulnerability-database/CVE-2019-1559

Severity Score

5.9

Weakness Type (CWE)

Exposure of Sensitive Information to an Unauthorized Actor

CWE-200

Observable Discrepancy

CWE-203

CVSS v3.1

Base Score:	5.9
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	HIGH
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	NONE
Availability (A):	NONE

CVSS v2

Base Score:	4.3
Access Vector (AV):	NETWORK
Access Complexity (AC):	MEDIUM
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	NONE
Availability (A):	NONE
Additional information:

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CVE-2019-1559

Date: February 27, 2019

Language: Python

Severity Score

Related Resources (41)

Severity Score

Weakness Type (CWE)

CVSS v3.1

CVSS v2

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