High severity · published May 4, 2017
CVE-2016-7053
In OpenSSL 1.1.0 before 1.1.0c, applications parsing invalid CMS structures can crash with a NULL pointer dereference
7.5
CVSS
21.7%
EPSS
No
On KEV
Description
In OpenSSL 1.1.0 before 1.1.0c, applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)21.7% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Openssl · Openssl
1.1.0; 1.1.0a; 1.1.0b · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-7053
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-7053
Third Party Advisory
http://www.securityfocus.com/bid/94244
www.securitytracker.com
http://www.securitytracker.com/id/1037261
h20566.www2.hpe.com
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03744en_us
Vendor Advisory
https://www.openssl.org/news/secadv/20161110.txt
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