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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.217 (97.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.217 · newest: 0.217 · change: 0.000
Affected products
- OpenSSL — versions openssl-1.1.0, 1.1.0a, openssl-1.1.0b
Weakness classification (CWE)
Public proof-of-concept exploits
References
- h20566.www2.hpe.com/hpsc/doc/public/display
- www.securityfocus.com/bid/94244 (VDB Entry, Third Party Advisory, vdb-entry)
- www.openssl.org/news/secadv/20161110.txt (Vendor Advisory)
- www.securitytracker.com/id/1037261 (vdb-entry)
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.