cJSON Library UTF8/UTF16 cjson.c parse_string memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in cJSON Library. This affects the function parse_string of the file cjson.c of the component UTF8/UTF16. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2016-4303. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in cJSON Library (Software Library) (affected version not known). This issue affects the function parse_string of the file cjson.c of the component UTF8/UTF16. 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:

The parse_string function in cjson.c in the cJSON library mishandles UTF8/16 strings, which allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a non-hex character in a JSON string, which triggers a heap-based buffer overflow.

The weakness was released 09/26/2016 (Website). It is possible to read the advisory at blog.talosintel.com. The identification of this vulnerability is CVE-2016-4303 since 04/27/2016. The exploitation is known to be easy. 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 pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/15/2025).

The vulnerability scanner Nessus provides a plugin with the ID 92129 (Fedora 23 : iperf3 (2016-9693e82a25)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169125 (OpenSuSE Security Update for iperf (openSUSE-SU-2016:2121-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (92129). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 92129
Nessus Name: Fedora 23 : iperf3 (2016-9693e82a25)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 880140
OpenVAS Name: Fedora Update for iperf3 FEDORA-2016-d67864115d
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

04/27/2016 🔍
06/17/2016 +51 days 🔍
07/14/2016 +27 days 🔍
09/26/2016 +74 days 🔍
09/26/2016 +0 days 🔍
09/27/2016 +1 days 🔍
01/15/2025 +3032 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-9693e82a25
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4303 (🔍)
GCVE (CVE): GCVE-0-2016-4303
GCVE (VulDB): GCVE-100-92171

Entryinfo

Created: 09/27/2016 10:45
Updated: 01/15/2025 20:39
Changes: 09/27/2016 10:45 (58), 04/26/2019 14:43 (12), 09/21/2022 11:32 (4), 09/21/2022 11:39 (1), 09/21/2022 11:47 (1), 10/02/2024 05:19 (16), 01/15/2025 20:39 (3)
Complete: 🔍
Cache ID: 216::103

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

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