Oniguruma 6.9.2 regext.c onig_new_deluxe Regular Expression use after free

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Oniguruma 6.9.2. Affected by this vulnerability is the function onig_new_deluxe of the file regext.c. The manipulation as part of Regular Expression leads to use after free. This vulnerability is uniquely identified as CVE-2019-13224. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Oniguruma 6.9.2 and classified as critical. This issue affects the function onig_new_deluxe of the file regext.c. The manipulation as part of a Regular Expression leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial of service, or possibly code execution by providing a crafted regular expression. The attacker provides a pair of a regex pattern and a string, with a multi-byte encoding that gets handled by onig_new_deluxe(). Oniguruma issues often affect Ruby, as well as common optional libraries for PHP and Rust.

The weakness was disclosed 07/10/2019 (GitHub Repository). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2019-13224 since 07/03/2019. 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 276359 (TencentOS Server 3: oniguruma (TSSA-2024:0077)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (276359) and CERT Bund (WID-SEC-2024-1086). The entry VDB-137688 is pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • SUSE Linux
  • IBM QRadar SIEM

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Use after free
CWE: CWE-416 / 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: 276359
Nessus Name: TencentOS Server 3: oniguruma (TSSA-2024:0077)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

07/03/2019 🔍
07/10/2019 +7 days 🔍
07/11/2019 +1 days 🔍
11/23/2025 +2327 days 🔍

Sourcesinfo

Advisory: K00103182
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-13224 (🔍)
GCVE (CVE): GCVE-0-2019-13224
GCVE (VulDB): GCVE-100-137687
CERT Bund: WID-SEC-2024-1086 - IBM QRadar SIEM: Mehrere Schwachstellen

See also: 🔍

Entryinfo

Created: 07/11/2019 11:28
Updated: 11/23/2025 02:25
Changes: 07/11/2019 11:28 (57), 07/03/2020 17:45 (1), 10/24/2023 12:25 (5), 10/24/2023 12:32 (1), 10/17/2025 01:53 (27), 11/23/2025 02:25 (3)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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