CVE-2016-3191

Description

The compile_branch function in pcre_compile.c in PCRE 8.x before 8.39 and pcre2_compile.c in PCRE2 before 10.22 mishandles patterns containing an (*ACCEPT) substring in conjunction with nested parentheses, which allows remote attackers to execute arbitrary code or cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror, aka ZDI-CAN-3542.

How to fix CVE-2016-3191

To remediate CVE-2016-3191, upgrade the affected package to a fixed version below.

• —upgrade to 8.38-r1 or later
• —upgrade to 10.21-1 or later
• —upgrade to 2:8.38-2 or later
• —upgrade to 8.02-1.1+deb6u1 or later

Is CVE-2016-3191 being exploited?

Moderate — EPSS is 7.9%. Track this CVE but it's not at the top of the prioritisation list.

Affected packages (4)

• from 0, < 8.38-r1
• from 0, < 10.21-1
• from 0, < 2:8.38-2
• from 0, < 8.02-1.1+deb6u1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2016-3191
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2016-3191