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
Published Oct 5, 2015
7.5
HIGHCVSS 2.0
EPSS 4.67%
Description
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.
Affected products
No data.
- ≤ 1.4.21
- 1.6.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.67% (0.04668) | 91.47th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.67% (0.04668) | 90.56th | v5 (v2026.06.15) |
| Nov 26, 2025 | 4.09% (0.04091) | 88.08th | v4 (v2025.03.14) |
| Jun 21, 2025 | 3.05% (0.03054) | 86.11th | v4 (v2025.03.14) |
| Jun 5, 2025 | 13.71% (0.13714) | 93.88th | v4 (v2025.03.14) |
| Mar 30, 2025 | 10.58% (0.10580) | 92.58th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.47% (0.06469) | 84.71th | v4 (v2025.03.14) |
| Mar 17, 2025 | 10.58% (0.10580) | 92.72th | v4 (v2025.03.14) |
| Dec 19, 2024 | 6.04% (0.06036) | 93.42th | v3 (v2023.03.01) |
| Dec 17, 2024 | 8.30% (0.08300) | 94.38th | v3 (v2023.03.01) |
| Jun 25, 2023 | 5.10% (0.05105) | 91.77th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.67% (0.04674) | 91.34th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.52% (0.06523) | 91.37th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.52% (0.06523) | 90.53th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.52% (0.06523) | 78.43th | v2 (v2022.01.01) |
References (3)
- http://packetstormsecurity.com/files/133781/freeswitch-Heap-Overflow.html x_refsource_MISCExploit
- http://www.securityfocus.com/archive/1/536569/100/0/threaded mailing-listx_refsource_BUGTRAQ
- https://freeswitch.org/stash/projects/FS/repos/freeswitch/commits/cf8925 x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/133781/freeswitch-Heap-Overflow.html | x_refsource_MISCExploit | |
| http://www.securityfocus.com/archive/1/536569/100/0/threaded | mailing-listx_refsource_BUGTRAQ | |
| https://freeswitch.org/stash/projects/FS/repos/freeswitch/commits/cf8925 | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.