THREATPORT/VULNERABILITY/CVE-2015-5334
CRITICAL SEVERITY

CVE-2015-5334

Libressl vulnerability

CVSS
9.8
EPSS
3.5%
EPSS pct
88th
Exploited
No known
Off-by-one error in the OBJ_obj2txt function in LibreSSL before 2.3.1 allows remote attackers to cause a denial of service (program crash) or possible execute arbitrary code via a crafted X.509 certificate, which triggers a stack-based buffer overflow. Note: this vulnerability exists because of an incorrect fix for CVE-2014-3508.
Affected vendor
Openbsd
Affected product
Libressl
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
Published
2020-01-23

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 confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2015-5334

  • Confirm whether Openbsd Libressl is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2015-5334.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-5334

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-5334 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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