What is CVE-2019-19945?

CVE-2019-19945 is a vulnerability in uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 that leads to out-of-bounds access to a heap buffer and a subsequent crash.

Which versions of OpenWrt are affected by CVE-2019-19945?

OpenWrt versions 18.06.0 through 18.06.5 and 19.07.0-rc1 through 19.07.0-rc2 are affected by CVE-2019-19945.

What is the severity of CVE-2019-19945?

CVE-2019-19945 has a severity rating of 7.5 (High).

How can CVE-2019-19945 be fixed?

To fix CVE-2019-19945, it is recommended to upgrade to a patched version of OpenWrt.

Vulnerability/
CVE-2019-19945

high

7.5

CWE

125 681

16/3/2020

5/8/2024

CVE-2019-19945

Q: How does CVE-2019-19945 occur?

CVE-2019-19945 occurs due to an integer signedness error in uhttpd, which can be triggered with an HTTP POST request to a CGI script, specifying both "Transfer-Encoding: chunked" and a large negative value.

First published: Mon Mar 16 2020(Updated: )

uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error. This leads to out-of-bounds access to a heap buffer and a subsequent crash. It can be triggered with an HTTP POST request to a CGI script, specifying both "Transfer-Encoding: chunked" and a large negative Content-Length value.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
OpenWrt OpenWrt	>=18.06.0<=18.06.5
OpenWrt OpenWrt	=19.07.0
OpenWrt OpenWrt	=19.07.0-rc1
OpenWrt OpenWrt	=19.07.0-rc2

Remedy

https://github.com/openwrt/openwrt/commits/master

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is CVE-2019-19945?
CVE-2019-19945 is a vulnerability in uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 that leads to out-of-bounds access to a heap buffer and a subsequent crash.
How does CVE-2019-19945 occur?
CVE-2019-19945 occurs due to an integer signedness error in uhttpd, which can be triggered with an HTTP POST request to a CGI script, specifying both "Transfer-Encoding: chunked" and a large negative value.
Which versions of OpenWrt are affected by CVE-2019-19945?
OpenWrt versions 18.06.0 through 18.06.5 and 19.07.0-rc1 through 19.07.0-rc2 are affected by CVE-2019-19945.
What is the severity of CVE-2019-19945?
CVE-2019-19945 has a severity rating of 7.5 (High).
How can CVE-2019-19945 be fixed?
To fix CVE-2019-19945, it is recommended to upgrade to a patched version of OpenWrt.

agent/weakness
agent/references
agent/type
agent/first-publish-date
agent/last-modified-date
collector/nvd-index
agent/software-canonical-lookup-request
agent/severity
agent/remedy
agent/author
agent/softwarecombine
agent/tags
agent/description
agent/event
collector/mitre-cve
source/MITRE
vendor/openwrt
canonical/openwrt openwrt
version/openwrt openwrt/18.06.0
version/openwrt openwrt/18.06.5
version/openwrt openwrt/19.07.0
version/openwrt openwrt/19.07.0-rc1
version/openwrt openwrt/19.07.0-rc2

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.