What’s Vulnerable › Vulnerabilities

CVE-2016-7053: CMS Null dereference

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 21.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-05-04 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• OpenSSL: 1.1.0, 1.1.0a, 1.1.0b

References

• http://www.securityfocus.com/bid/94244
• http://www.securitytracker.com/id/1037261
• https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03744en_us
• https://www.openssl.org/news/secadv/20161110.txt
• http://www.securityfocus.com/bid/94244
• http://www.securitytracker.com/id/1037261
• https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03744en_us
• https://www.openssl.org/news/secadv/20161110.txt

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