VDB-232303 · CVE-2023-34188 · EUVD-2023-38288

Cesenta Mongoose up to 7.9 Header Content-Length privilege escalation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cesenta Mongoose up to 7.9. Impacted is an unknown function of the component Header Handler. This manipulation of the argument Content-Length causes an unknown weakness. This vulnerability appears as CVE-2023-34188. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cesenta Mongoose up to 7.9 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component Header Handler. The manipulation of the argument Content-Length with an unknown input leads to a unknown weakness. The impact remains unknown. The summary by CVE is:

The HTTP server in Mongoose before 7.10 accepts requests containing negative Content-Length headers.

The weakness was presented 06/24/2023. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-34188 since 05/30/2023. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 7.10 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 4663090a8fb036146dfe77718cff612b0101cb0f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-38288). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Cesenta

Name

Mongoose

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mongoose 7.10
Patch: 4663090a8fb036146dfe77718cff612b0101cb0f

Timelineinfo

05/30/2023 🔍
06/23/2023 +24 days 🔍
06/24/2023 +0 days 🔍
01/07/2026 +928 days 🔍

Sourcesinfo

Advisory: 4663090a8fb036146dfe77718cff612b0101cb0f
Status: Confirmed

CVE: CVE-2023-34188 (🔍)
GCVE (CVE): GCVE-0-2023-34188
GCVE (VulDB): GCVE-100-232303
EUVD: 🔍

Entryinfo

Created: 06/24/2023 00:54
Updated: 01/07/2026 06:14
Changes: 06/24/2023 00:54 (42), 07/18/2023 09:56 (1), 07/18/2023 09:59 (11), 01/07/2026 06:14 (15)
Complete: 🔍
Cache ID: 216::103