high
7.5
CWE
125
Advisory Published
CVE Published
Updated

CVE-2019-20454

First published: Sun Jul 28 2019(Updated: )

A flaw was found in libpcre. A buffer overread in JIT mode when \X is used in non-UTF mode may cause application crash and denial of service. The flaw is in function do_extuni_no_utf() in pcre2_jit_compile.c, which uses the macro GETCHARINC to read a character. However, in case there is an invalid UTF character the value read is too big, which causes an out-of-bounds read in the next statement, while executing macro UCD_GRAPHBREAK. References: <a href="https://bugs.exim.org/show_bug.cgi?id=2421">https://bugs.exim.org/show_bug.cgi?id=2421</a> <a class="bz_bug_link bz_secure " title="" href="show_bug.cgi?id=1734468">https://bugzilla.redhat.com/show_bug.cgi?id=1734468</a> Upstream patch: <a href="http://git.php.net/?p=php-src.git;a=commitdiff;h=8947fd9e9fdce87cd6c59817b1db58e789538fe9">http://git.php.net/?p=php-src.git;a=commitdiff;h=8947fd9e9fdce87cd6c59817b1db58e789538fe9</a>

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/pcre2<0:10.32-2.el8
0:10.32-2.el8
Pcre Pcre2>=10.31<10.34
Fedoraproject Fedora=31
redhat/pcre<10.34
10.34
Splunk Universal Forwarder>=8.2.0<8.2.12
Splunk Universal Forwarder>=9.0.0<9.0.6
Splunk Universal Forwarder=9.1.0

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1735494

Remedy

https://vcs.pcre.org/pcre2?view=revision&revision=1092

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2019-20454?

    CVE-2019-20454 is an out-of-bounds read vulnerability in PCRE that can lead to application crashes.

  • How does CVE-2019-20454 affect PCRE?

    CVE-2019-20454 affects PCRE versions before 10.34 when the \X pattern is JIT compiled and used to match specially crafted subjects in non-UTF mode.

  • What is the severity of CVE-2019-20454?

    CVE-2019-20454 has a severity rating of 7.5 (high).

  • How can CVE-2019-20454 be exploited?

    CVE-2019-20454 can be exploited by an attacker using specially crafted subjects to crash applications that use PCRE for parsing untrusted input.

  • Is there a fix for CVE-2019-20454?

    Yes, PCRE version 10.34 or higher includes a fix for CVE-2019-20454.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203