Cesanta Mongoose 6.8 MQTT Packet Parser MQTT SUBSCRIBE Packet null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Cesanta Mongoose 6.8. It has been rated as problematic. Affected is an unknown function of the component MQTT Packet Parser. This manipulation as part of MQTT SUBSCRIBE Packet causes null pointer dereference. This vulnerability is tracked as CVE-2017-2893. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in Cesanta Mongoose 6.8. Affected by this vulnerability is an unknown function of the component MQTT Packet Parser. The manipulation as part of a MQTT SUBSCRIBE Packet leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

An exploitable NULL pointer dereference vulnerability exists in the MQTT packet parsing functionality of Cesanta Mongoose 6.8. An MQTT SUBSCRIBE packet can cause a NULL pointer dereference leading to server crash and denial of service. An attacker needs to send a specially crafted MQTT packet over the network to trigger this vulnerability.

The bug was discovered 10/31/2017. The weakness was disclosed 11/07/2017 (Website). It is possible to read the advisory at talosintelligence.com. This vulnerability is known as CVE-2017-2893 since 12/01/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k.

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

The entries VDB-109211, VDB-109209, VDB-109208 and VDB-109206 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.8

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

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (Talos): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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

12/01/2016 🔍
10/31/2017 +334 days 🔍
11/07/2017 +7 days 🔍
11/07/2017 +0 days 🔍
11/08/2017 +1 days 🔍
01/06/2023 +1885 days 🔍

Sourcesinfo

Advisory: talosintelligence.com
Status: Not defined

CVE: CVE-2017-2893 (🔍)
GCVE (CVE): GCVE-0-2017-2893
GCVE (VulDB): GCVE-100-109207
See also: 🔍

Entryinfo

Created: 11/08/2017 07:50
Updated: 01/06/2023 17:22
Changes: 11/08/2017 07:50 (58), 12/05/2019 08:23 (1), 01/06/2023 17:22 (14)
Complete: 🔍
Cache ID: 216::103

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