CVE-2019-19945

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

uhttpd en OpenWrt versiones hasta 18.06.5 y versiones 19.x hasta 19.07.0-rc2, presenta un error de la propiedad signedness de enteros. Esto conlleva a un acceso fuera de límites en un búfer de la pila y un bloqueo posterior. Se puede activar con una petición HTTP POST en un script CGI, especificando tanto "Transfer-Encoding: chunked" como un valor negativo grande de Content-Length.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-23 CVE Reserved
2020-03-16 CVE Published
2022-06-27 First Exploit
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-125: Out-of-bounds Read
CWE-681: Incorrect Conversion between Numeric Types

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/delicateByte/CVE-2019-19945_Test	2022-06-27

URL	Date	SRC
https://github.com/openwrt/openwrt/commits/master	2023-05-24

URL	Date	SRC
https://openwrt.org/advisory/2020-01-13-1	2023-05-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openwrt Search vendor "Openwrt"		Openwrt Search vendor "Openwrt" for product "Openwrt"				>= 18.06.0 <= 18.06.5 Search vendor "Openwrt" for product "Openwrt" and version " >= 18.06.0 <= 18.06.5"		-		Affected
Openwrt Search vendor "Openwrt"		Openwrt Search vendor "Openwrt" for product "Openwrt"				19.07.0 Search vendor "Openwrt" for product "Openwrt" and version "19.07.0"		-		Affected
Openwrt Search vendor "Openwrt"		Openwrt Search vendor "Openwrt" for product "Openwrt"				19.07.0 Search vendor "Openwrt" for product "Openwrt" and version "19.07.0"		rc1		Affected
Openwrt Search vendor "Openwrt"		Openwrt Search vendor "Openwrt" for product "Openwrt"				19.07.0 Search vendor "Openwrt" for product "Openwrt" and version "19.07.0"		rc2		Affected