Out-of-bounds Read Affecting pcre2 package, versions <10.34-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.14% (51st percentile)

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  • Snyk IDSNYK-DEBIAN11-PCRE2-548865
  • published14 Feb 2020
  • disclosed14 Feb 2020

Introduced: 14 Feb 2020

CVE-2019-20454  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Debian:11 pcre2 to version 10.34-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pcre2 package and not the pcre2 package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.

CVSS Scores

version 3.1