Vulnerability CVE-2019-1559


Published: 2019-02-27   Modified: 2019-02-28

Description:
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).

Type:

CWE-200

(Information Exposure)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Tenable -> Nessus 
Opensuse -> LEAP 
Openssl -> Openssl 
Netapp -> Snapcenter 
Netapp -> Storage automation store 
Netapp -> Oncommand unified manager 
Netapp -> Oncommand workflow automation 
Netapp -> Ontap select deploy 
Netapp -> Snapdrive 
Netapp -> Storagegrid 
Netapp -> Element software 
Netapp -> Hyper converged infrastructure 
Netapp -> Ontap select deploy administration utility 
Netapp -> Santricity smi-s provider 
Netapp -> Steelstore cloud integrated storage 
F5 -> Traffix signaling delivery controller 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 References:
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00046.html
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00049.html
http://www.securityfocus.com/bid/107174
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=e9bbefbf0f24c57645e7ad6a5a71ae649d18ac8e
https://kc.mcafee.com/corporate/index?page=content&id=SB10282
https://lists.debian.org/debian-lts-announce/2019/03/msg00003.html
https://security.gentoo.org/glsa/201903-10
https://security.netapp.com/advisory/ntap-20190301-0001/
https://security.netapp.com/advisory/ntap-20190301-0002/
https://security.netapp.com/advisory/ntap-20190423-0002/
https://support.f5.com/csp/article/K18549143
https://usn.ubuntu.com/3899-1/
https://www.debian.org/security/2019/dsa-4400
https://www.openssl.org/news/secadv/20190226.txt
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.tenable.com/security/tns-2019-02
https://www.tenable.com/security/tns-2019-03

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