VDB-136248 · CVE-2018-20354 · GCVE-0-2018-20354

Cesanta Mongoose Embedded Web Server Library up to 6.13 mongoose.c mg_http_get_proto_data use after free

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.
8.5	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Cesanta Mongoose Embedded Web Server Library up to 6.13. This affects the function mg_http_get_proto_data of the file mongoose.c. The manipulation results in use after free. This vulnerability was named CVE-2018-20354. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Cesanta Mongoose Embedded Web Server Library up to 6.13 (Web Server). It has been classified as critical. Affected is the function mg_http_get_proto_data of the file mongoose.c. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An invalid read of 8 bytes due to a use-after-free vulnerability during a "return" in the mg_http_get_proto_data function in mongoose.c in Cesanta Mongoose Embedded Web Server Library 6.13 and earlier allows a denial of service (application crash) or remote code execution.

The weakness was presented 06/10/2019. This vulnerability is traded as CVE-2018-20354 since 12/22/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

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

See VDB-136250, VDB-136249, VDB-136247 and VDB-136246 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Web Server

Vendor

Cesanta

Name

Mongoose Embedded Web Server Library

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/22/2018 🔍
06/10/2019 +170 days 🔍
06/11/2019 +1 days 🔍
10/03/2023 +1575 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2018-20354 (🔍)
GCVE (CVE): GCVE-0-2018-20354
GCVE (VulDB): GCVE-100-136248
See also: 🔍

Entryinfo

Created: 06/11/2019 06:58
Updated: 10/03/2023 08:57
Changes: 06/11/2019 06:58 (38), 06/21/2020 17:12 (18), 10/03/2023 08:57 (3)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.