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

CVSS Meta Temp Score
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CTI Interest Score
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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 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). Entries connected to this vulnerability are available at VDB-92171 and VDB-134186.




CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 88696
Nessus Name: FreeSWITCH < 1.4.26 / 1.6.x < 1.6.5 JSON Parser RCE
Nessus File: 🔍
Nessus Risk: 🔍
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: FreeSWITCH 1.4.23/1.6.2


09/29/2015 🔍
10/05/2015 +6 days 🔍
10/05/2015 +0 days 🔍
10/06/2015 +1 days 🔍
06/20/2022 +2449 days 🔍


Advisory: 133781
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-7392 (🔍)
SecurityFocus: 76976

See also: 🔍


Created: 10/06/2015 11:36 AM
Updated: 06/20/2022 08:39 AM
Changes: 10/06/2015 11:36 AM (42), 01/18/2018 07:51 AM (12), 06/20/2022 08:37 AM (3), 06/20/2022 08:39 AM (2)
Complete: 🔍
Cache ID: 100:83F:40


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