sparklemotion nokogiri c29c920907366cb74af13b4dc2230e9c9e23b833 hashmap.c hashmap_get_with_hash heap-based overflow ⚔ [Disputed]

CVSS Meta Temp Score
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CTI Interest Score
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3.1$0-$5k1.29

Summaryinfo

A vulnerability marked as problematic has been reported in sparklemotion nokogiri c29c920907366cb74af13b4dc2230e9c9e23b833. Affected by this issue is the function hashmap_get_with_hash of the file gumbo-parser/src/hashmap.c. Performing a manipulation results in heap-based overflow. This vulnerability is identified as CVE-2025-6494. The attack is only possible with local access. Additionally, an exploit exists. There are still doubts about whether this vulnerability truly exists. To fix this issue, it is recommended to deploy a patch. The project maintainer explains that the affected code was merged into the main branch but the commit never appeared in an official release.

Detailsinfo

A vulnerability was found in sparklemotion nokogiri c29c920907366cb74af13b4dc2230e9c9e23b833. It has been classified as problematic. This affects the function hashmap_get_with_hash of the file gumbo-parser/src/hashmap.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on availability.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-6494. The exploitability is told to be easy. Attacking locally is a requirement. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The real existence of this vulnerability is still doubted at the moment. The project maintainer explains that the affected code was merged into the main branch but the commit never appeared in an official release.

Applying the patch ada4708e5a67114402cd3feb70a4e1d1d7cf773a is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-18858). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.1

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 3.3
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: ada4708e5a67114402cd3feb70a4e1d1d7cf773a

Timelineinfo

06/22/2025 🔍
06/22/2025 +0 days 🔍
06/30/2025 +8 days 🔍

Sourcesinfo

Product: github.com

Advisory: 3508
Status: Confirmed
Confirmation: 🔍
Disputed: 🔍

CVE: CVE-2025-6494 (🔍)
GCVE (CVE): GCVE-0-2025-6494
GCVE (VulDB): GCVE-100-313611
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/22/2025 08:48
Updated: 06/30/2025 22:27
Changes: 06/22/2025 08:48 (56), 06/23/2025 01:41 (30), 06/23/2025 03:32 (1), 06/30/2025 21:13 (13), 06/30/2025 22:27 (1)
Complete: 🔍
Submitter: JJLeo
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #601006: sparklemotion nokogiri nokogiri v1.18.7 (commit a024cff) Heap-based Buffer Overflow (by JJLeo)

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

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