THREATPORT/VULNERABILITY/CVE-2015-8386
CRITICAL SEVERITY

CVE-2015-8386

Perl Compatible Regular Expression Library vulnerability

CVSS
9.8
EPSS
7.1%
EPSS pct
94th
Exploited
No known
PCRE before 8.38 mishandles the interaction of lookbehind assertions and mutually recursive subpatterns, which allows remote attackers to cause a denial of service (buffer overflow) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.
Affected vendor
Pcre
Affected product
Perl Compatible Regular Expression Library
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
Published
2015-12-02

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 7.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2015-8386

  • Confirm whether Pcre Perl Compatible Regular Expression Library is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2015-8386.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-8386

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-8386 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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