OpenWrt up to 19.07.0-rc2 uhttpd HTTP POST Request memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in OpenWrt up to 19.07.0-rc2. Impacted is an unknown function of the component uhttpd. Executing a manipulation as part of HTTP POST Request can lead to memory corruption. The identification of this vulnerability is CVE-2019-19945. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in OpenWrt up to 19.07.0-rc2. It has been declared as problematic. This vulnerability affects an unknown functionality of the component uhttpd. The manipulation as part of a HTTP POST Request leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. CVE summarizes:

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.

The weakness was shared 03/16/2020 (Website). The advisory is shared for download at openwrt.org. This vulnerability was named CVE-2019-19945 since 12/23/2019. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/23/2019 🔍
03/16/2020 +84 days 🔍
03/17/2020 +1 days 🔍
03/17/2020 +0 days 🔍

Sourcesinfo

Advisory: openwrt.org
Status: Not defined

CVE: CVE-2019-19945 (🔍)
GCVE (CVE): GCVE-0-2019-19945
GCVE (VulDB): GCVE-100-151684

Entryinfo

Created: 03/17/2020 08:43
Updated: 03/17/2020 08:48
Changes: 03/17/2020 08:43 (37), 03/17/2020 08:48 (17)
Complete: 🔍
Cache ID: 216::103

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