Heap-based buffer overflow in the parse_string function in libs/esl/src/esl_json.c in…
Priority MEDIUM 40CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.04668 91st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:* | up to 1.4.21 | Vulnerable | freeswitch |
| cpe:2.3:a:freeswitch:freeswitch:1.6.0:*:*:*:*:*:*:* | 1.6.0 | Vulnerable | freeswitch |
- cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:* Versions up to 1.4.21 Vulnerable ·freeswitch
- cpe:2.3:a:freeswitch:freeswitch:1.6.0:*:*:*:*:*:*:* Versions 1.6.0 Vulnerable ·freeswitch
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-7392
- 2026-10-03 Alias added: GHSA-h2p5-8h8f-7g53
References
More Freeswitch vulnerabilities
- TI-2023-28097 FreeSWITCH susceptible to Denial of Service via DTLS Hello packets during call initiation CVSS 3.1HIGH 7.5
- TI-2023-20909 Resource allocation without limits in signalwire freeswitch CVSS 3.1HIGH 7.5
- TI-2023-20908 FreeSWITCH allows remote users to trigger out of bounds write by offering an ICE candidate with unknown component ID CVSS 3.1HIGH 7.5
- TI-2019-14041 FreeSWITCH 1.6.10 through 1.10.1 has a default password in event_socket.conf.xml. CVSS 3.1CRITICAL 9.8
- TI-2026-36745 FreeSWITCH: Pre-authentication heap buffer overflow in `mod_verto` HTTP POST body read CVSS 3.1CRITICAL 9.8
- TI-2026-36744 FreeSWITCH: Pre-authentication heap buffer overflow in libesl `Content-Length` parsing CVSS 3.1CRITICAL 9.1
Sources
- CVE-2015-7392 · CVE Program
- CVE-2015-7392 · NVD
- FIRST EPSS
- GHSA-h2p5-8h8f-7g53 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences