FreeSWITCH up to 1.4.22/1.6.1 JSON String libs/esl/src/esl_json.c parse_string memory corruption

Summaryinfo

A vulnerability was found in FreeSWITCH up to 1.4.22/1.6.1. It has been classified as critical. This affects the function parse_string of the file libs/esl/src/esl_json.c of the component JSON String Handler. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2015-7392. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in FreeSWITCH up to 1.4.22/1.6.1 and classified as critical. This issue affects the function parse_string of the file libs/esl/src/esl_json.c of the component JSON String Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in the parse_string function in libs/esl/src/esl_json.c in FreeSWITCH before 1.4.23 and 1.6.x before 1.6.2 allows remote attackers to execute arbitrary code via a trailing \u in a json string to cJSON_Parse.

The weakness was released 10/05/2015 (Website). It is possible to read the advisory at freeswitch.org. The identification of this vulnerability is CVE-2015-7392 since 09/29/2015. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 88696 (FreeSWITCH < 1.4.26 / 1.6.x < 1.6.5 JSON Parser RCE), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc..

Upgrading to version 1.4.23 or 1.6.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (88696). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• FreeSWITCH

Version

• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4
• 1.4.5
• 1.4.6
• 1.4.7
• 1.4.8
• 1.4.9
• 1.4.10
• 1.4.11
• 1.4.12
• 1.4.13
• 1.4.14
• 1.4.15
• 1.4.16
• 1.4.17
• 1.4.18
• 1.4.19
• 1.4.20
• 1.4.21
• 1.4.22
• 1.6.0
• 1.6.1

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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