7.5
HIGH
CVE-2019-20838
PCRE Buffer Over-read Vulnerability
Description

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.

INFO

Published Date :

June 15, 2020, 5:15 p.m.

Last Modified :

Nov. 21, 2024, 4:39 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2019-20838 has a 15 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2019-20838 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apple macos
1 Pcre pcre
1 Splunk universal_forwarder
: Total Affected Vendor : 3 | Products : 3
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2019-20838.

URL Resource
http://seclists.org/fulldisclosure/2020/Dec/32 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Feb/14 Mailing List Third Party Advisory
https://bugs.gentoo.org/717920 Issue Tracking Patch Third Party Advisory VDB Entry
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E Mailing List Third Party Advisory
https://support.apple.com/kb/HT211931 Vendor Advisory
https://support.apple.com/kb/HT212147 Vendor Advisory
https://www.pcre.org/original/changelog.txt Release Notes Vendor Advisory
http://seclists.org/fulldisclosure/2020/Dec/32 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Feb/14 Mailing List Third Party Advisory
https://bugs.gentoo.org/717920 Issue Tracking Patch Third Party Advisory VDB Entry
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E Mailing List Third Party Advisory
https://support.apple.com/kb/HT211931 Vendor Advisory
https://support.apple.com/kb/HT212147 Vendor Advisory
https://www.pcre.org/original/changelog.txt Release Notes Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
Srinu-rj/spring-food-app

None

Dockerfile Roff Java

Updated: 2 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : Oct. 7, 2024, 8:52 a.m. This repo has been linked 127 different CVEs too.
Profile Photo
mmbazm/secure_license_server

None

Dockerfile Python

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : Oct. 5, 2024, 4:56 p.m. This repo has been linked 68 different CVEs too.
Profile Photo
fokypoky/places-list

None

asp-net-core csharp docker dockerfile javascript react webapi docker-compose

C# Dockerfile HTML JavaScript CSS

Updated: 8 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Feb. 22, 2024, 6:42 p.m. This repo has been linked 383 different CVEs too.
Profile Photo
cdupuis/image-api

None

TypeScript

Updated: 2 years ago
0 stars 0 fork 0 watcher
Born at : Dec. 6, 2022, 12:43 p.m. This repo has been linked 43 different CVEs too.
Profile Photo
flexiondotorg/CNCF-02

CNCF Live: Complexity vs Size vs Security

Python Shell

Updated: 1 year, 1 month ago
1 stars 0 fork 0 watcher
Born at : May 25, 2022, 2:38 p.m. This repo has been linked 12 different CVEs too.
Profile Photo
yeforriak/snyk-to-cve

None

Go

Updated: 2 years, 8 months ago
0 stars 0 fork 0 watcher
Born at : March 29, 2022, 1:06 p.m. This repo has been linked 13 different CVEs too.
Profile Photo
akiraabe/myapp-container-jaxrs

None

Java Shell

Updated: 2 years, 9 months ago
0 stars 0 fork 0 watcher
Born at : March 8, 2022, 11:16 a.m. This repo has been linked 25 different CVEs too.
Profile Photo
nedenwalker/spring-boot-app-using-gradle

None

Java

Updated: 3 years ago
0 stars 1 fork 1 watcher
Born at : Dec. 14, 2021, 4:38 p.m. This repo has been linked 26 different CVEs too.
Profile Photo
nedenwalker/spring-boot-app-with-log4j-vuln

None

Java

Updated: 3 years ago
0 stars 0 fork 0 watcher
Born at : Dec. 13, 2021, 7 p.m. This repo has been linked 26 different CVEs too.
Profile Photo
dispera/giant-squid

Random late night exercises

Dockerfile Shell Python HCL

Updated: 3 years ago
0 stars 0 fork 0 watcher
Born at : Nov. 17, 2021, 11:43 a.m. This repo has been linked 23 different CVEs too.
Profile Photo
domyrtille/interview_project

None

Dockerfile Python HCL

Updated: 3 years, 2 months ago
0 stars 0 fork 0 watcher
Born at : Oct. 11, 2021, 9:55 p.m. This repo has been linked 14 different CVEs too.
Profile Photo
brandoncamenisch/release-the-code-litecoin

a test code repository

Dockerfile HCL

Updated: 1 year, 9 months ago
1 stars 0 fork 0 watcher
Born at : Sept. 29, 2021, 6:37 p.m. This repo has been linked 13 different CVEs too.
Profile Photo
onzack/trivy-multiscanner

Scan a list of container images using Aqua Security's trivy CLI tool

Shell

Updated: 1 year, 3 months ago
1 stars 1 fork 1 watcher
Born at : July 19, 2021, 4:54 p.m. This repo has been linked 18 different CVEs too.
Profile Photo
epequeno/devops-demo

demo stuff

Dockerfile Rust Shell HCL

Updated: 3 years, 5 months ago
0 stars 0 fork 0 watcher
Born at : July 18, 2021, 8:20 p.m. This repo has been linked 19 different CVEs too.
Profile Photo
garethr/snykout

A command line tool which provides an alternative interface to snyk test

snyk

Makefile Dockerfile Crystal Open Policy Agent

Updated: 2 years, 10 months ago
4 stars 4 fork 4 watcher
Born at : Aug. 31, 2020, 8:31 a.m. This repo has been linked 82 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2019-20838 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2019-20838 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2020/Dec/32
    Added Reference http://seclists.org/fulldisclosure/2021/Feb/14
    Added Reference https://bugs.gentoo.org/717920
    Added Reference https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
    Added Reference https://support.apple.com/kb/HT211931
    Added Reference https://support.apple.com/kb/HT212147
    Added Reference https://www.pcre.org/original/changelog.txt
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Mar. 27, 2024

    Action Type Old Value New Value
    Changed Reference Type https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E Mailing List, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* versions from (including) 8.2.0 up to (excluding) 8.2.12 *cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.6 *cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E [No types assigned]
    Removed Reference MITRE https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
  • CPE Deprecation Remap by [email protected]

    Sep. 22, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:apple:mac_os:*:*:*:*:*:*:*:* versions from (excluding) 11.0.1 OR *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (excluding) 11.0.1
  • Modified Analysis by [email protected]

    Mar. 15, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E Mailing List, Third Party Advisory
  • CVE Modified by [email protected]

    Feb. 25, 2021

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E [No Types Assigned]
  • Modified Analysis by [email protected]

    Feb. 11, 2021

    Action Type Old Value New Value
    Changed Reference Type http://seclists.org/fulldisclosure/2020/Dec/32 No Types Assigned http://seclists.org/fulldisclosure/2020/Dec/32 Mailing List, Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2021/Feb/14 No Types Assigned http://seclists.org/fulldisclosure/2021/Feb/14 Mailing List, Third Party Advisory
    Changed Reference Type https://bugs.gentoo.org/717920 Third Party Advisory, VDB Entry https://bugs.gentoo.org/717920 Issue Tracking, Patch, Third Party Advisory, VDB Entry
    Changed Reference Type https://support.apple.com/kb/HT211931 No Types Assigned https://support.apple.com/kb/HT211931 Vendor Advisory
    Changed Reference Type https://support.apple.com/kb/HT212147 No Types Assigned https://support.apple.com/kb/HT212147 Vendor Advisory
    Added CPE Configuration OR *cpe:2.3:o:apple:mac_os:*:*:*:*:*:*:*:* versions up to (excluding) 11.0.1
  • CVE Modified by [email protected]

    Feb. 02, 2021

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2021/Feb/14 [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 01, 2021

    Action Type Old Value New Value
    Added Reference https://support.apple.com/kb/HT212147 [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 15, 2020

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2020/Dec/32 [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 12, 2020

    Action Type Old Value New Value
    Added Reference https://support.apple.com/kb/HT211931 [No Types Assigned]
  • Reanalysis by [email protected]

    Jun. 30, 2020

    Action Type Old Value New Value
    Removed CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:P)
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P)
    Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Initial Analysis by [email protected]

    Jun. 25, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
    Changed Reference Type https://bugs.gentoo.org/717920 No Types Assigned https://bugs.gentoo.org/717920 Third Party Advisory, VDB Entry
    Changed Reference Type https://www.pcre.org/original/changelog.txt No Types Assigned https://www.pcre.org/original/changelog.txt Release Notes, Vendor Advisory
    Added CWE NIST CWE-125
    Added CPE Configuration OR *cpe:2.3:a:pcre:pcre:*:*:*:*:*:*:*:* versions up to (excluding) 8.43
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-20838 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2019-20838 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.58 }} -0.40%

score

0.77950

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: