Oniguruma up to 6.9.4_rc1 gb18030.c gb18030_mbc_enc_len out-of-bounds

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

Summaryinfo

A vulnerability described as critical has been identified in Oniguruma up to 6.9.4_rc1. This affects the function gb18030_mbc_enc_len of the file gb18030.c. The manipulation results in out-of-bounds. This vulnerability was named CVE-2019-19203. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Oniguruma up to 6.9.4_rc1. Affected is the function gb18030_mbc_enc_len of the file gb18030.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Oniguruma 6.x before 6.9.4_rc2. In the function gb18030_mbc_enc_len in file gb18030.c, a UChar pointer is dereferenced without checking if it passed the end of the matched string. This leads to a heap-based buffer over-read.

The weakness was presented 11/21/2019. This vulnerability is traded as CVE-2019-19203 since 11/21/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 234513 (Amazon Linux 2 : php (ALAS-2025-2832)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.9.4_rc2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (234513) and CERT Bund (WID-SEC-2024-1086). See VDB-146089 for similar entry. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • SUSE Linux
  • IBM QRadar SIEM

Productinfo

Name

Version

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: Out-of-bounds
CWE: CWE-125 / 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: 234513
Nessus Name: Amazon Linux 2 : php (ALAS-2025-2832)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Oniguruma 6.9.4_rc2

Timelineinfo

11/21/2019 🔍
11/21/2019 +0 days 🔍
11/22/2019 +1 days 🔍
10/17/2025 +2155 days 🔍

Sourcesinfo

Advisory: 163
Status: Confirmed

CVE: CVE-2019-19203 (🔍)
GCVE (CVE): GCVE-0-2019-19203
GCVE (VulDB): GCVE-100-146088
CERT Bund: WID-SEC-2024-1086 - IBM QRadar SIEM: Mehrere Schwachstellen

See also: 🔍

Entryinfo

Created: 11/22/2019 08:24
Updated: 10/17/2025 01:53
Changes: 11/22/2019 08:24 (38), 11/22/2019 08:29 (17), 02/26/2024 10:22 (6), 02/26/2024 10:29 (1), 04/25/2025 05:49 (19), 10/17/2025 01:53 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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