VDB-293514 · CVE-2025-0696 · GCVE-0-2025-0696

Cesanta Frozen up to 1.6 JSON null pointer dereference

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.
5.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Cesanta Frozen up to 1.6 and classified as problematic. Affected by this issue is some unknown functionality of the component JSON Handler. The manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2025-0696. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cesanta Frozen up to 1.6. It has been classified as problematic. Affected is an unknown code of the component JSON Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

A NULL Pointer Dereference vulnerability in Cesanta Frozen versions less than 1.7 allows an attacker to induce a crash of the component embedding the library by supplying a maliciously crafted JSON as input.

The weakness was shared by Diego Zaffaroni. The advisory is available at nozominetworks.com. This vulnerability is traded as CVE-2025-0696 since 01/24/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 1.7 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Cesanta

Name

Frozen

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (Nozomi): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

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: 🔍

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: Frozen 1.7

Timelineinfo

01/24/2025 🔍
01/27/2025 +3 days 🔍
01/27/2025 +0 days 🔍
01/27/2025 +0 days 🔍

Sourcesinfo

Advisory: nozominetworks.com
Researcher: Diego Zaffaroni
Status: Confirmed

CVE: CVE-2025-0696 (🔍)
GCVE (CVE): GCVE-0-2025-0696
GCVE (VulDB): GCVE-100-293514

Entryinfo

Created: 01/27/2025 12:40
Updated: 01/27/2025 13:16
Changes: 01/27/2025 12:40 (11), 01/27/2025 12:41 (21), 01/27/2025 12:44 (33), 01/27/2025 13:16 (1)
Complete: 🔍
Committer: mitr
Cache ID: 216::103