NULL pointer dereference in Openssl
CVE-2016-7053
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.
EPSS: 0.217 (97.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Openssl — versions openssl-1.1.0, 1.1.0a, openssl-1.1.0b
Weakness classification (CWE)
Public proof-of-concept exploits
References
- openssl-security@openssl.org (x_refsource_CONFIRM)
- openssl-security@openssl.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- openssl-security@openssl.org (x_refsource_CONFIRM, Vendor Advisory)
- openssl-security@openssl.org (vdb-entry, x_refsource_SECTRACK)
Frequently asked questions
- What is CVE-2016-7053?
- CVE-2016-7053 is a high-severity vulnerability in Openssl, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2017-05-04.
- How severe is CVE-2016-7053?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-7053 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.