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CVE-2019-19945

HIGHCVSS 7.5/10EPSS 1.55%

Last modified

CVE-2019-19945 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.55% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.55%

71.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
OpenwrtOpenwrt>= 18.06.0, <= 18.06.5
OpenwrtOpenwrt19.07.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-19945?
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.
How severe is CVE-2019-19945?
CVE-2019-19945 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.55% probability of exploitation in the next 30 days.
How do I fix CVE-2019-19945?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19945?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST