json-c up to 0.14 JSON File printbuf_memappend out-of-bounds write

Summaryinfo

A vulnerability identified as critical has been detected in json-c up to 0.14. This issue affects the function printbuf_memappend of the component JSON File Handler. The manipulation leads to out-of-bounds write. This vulnerability is documented as CVE-2020-12762. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability was found in json-c up to 0.14. It has been rated as critical. This issue affects the function printbuf_memappend of the component JSON File Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.

The weakness was released 05/09/2020 (GitHub Repository). The advisory is shared at github.com. The identification of this vulnerability is CVE-2020-12762 since 05/09/2020. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 239864 (TencentOS Server 3: json (TSSA-2022:0205)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the databases at Tenable (239864) and CERT Bund (WID-SEC-2024-0794). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Dell PowerEdge
• Dell ECS

Productinfo

Name

• json-c

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14

Website

• Product: https://github.com/json-c/json-c/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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