THREATPORT/VULNERABILITY/CVE-2016-7053
HIGH SEVERITY

CVE-2016-7053

Openssl vulnerability

CVSS
7.5
EPSS
21.7%
EPSS pct
97th
Exploited
No known
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 vendor
Openssl
Affected product
Openssl
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-476 — NULL Pointer Dereference
Published
2017-05-04

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 21.7% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2016-7053

  • Confirm whether Openssl Openssl is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2016-7053.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-7053

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