THREATPORT/VULNERABILITY/CVE-2016-9939
HIGH SEVERITY

CVE-2016-9939

Crypto\+\+ vulnerability

CVSS
7.5
EPSS
4.2%
EPSS pct
90th
Exploited
No known
Crypto++ (aka cryptopp and libcrypto++) 5.6.4 contained a bug in its ASN.1 BER decoding routine. The library will allocate a memory block based on the length field of the ASN.1 object. If there is not enough content octets in the ASN.1 object, then the function will fail and the memory block will be zeroed even if its unused. There is a noticeable delay during the wipe for a large allocation.
Affected vendor
Cryptopp
Affected product
Crypto\+\+
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-20 — Improper Input Validation
Published
2017-01-30

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 4.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2016-9939

  • Confirm whether Cryptopp Crypto\+\+ is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2016-9939.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-9939

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-9939 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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