9fans plan9port up to 9da5b44 src/libsec/port/x509.c value_decode null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in 9fans plan9port up to 9da5b44 and classified as problematic. The impacted element is the function value_decode in the library src/libsec/port/x509.c. This manipulation causes null pointer dereference. This vulnerability is tracked as CVE-2025-7209. The attack is restricted to local execution. Moreover, an exploit is present. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability has been found in 9fans plan9port up to 9da5b44 and classified as problematic. Affected by this vulnerability is the function value_decode in the library src/libsec/port/x509.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-7209. The exploitation appears to be easy. An attack has to be approached locally. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Applying the patch deae8939583d83fd798fca97665e0e94656c3ee8 is able to eliminate this problem. The bugfix is ready for download at git.9front.org.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-20761). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

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: 4.0
VulDB Meta Temp Score: 3.9

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

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 3.3
CNA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: deae8939583d83fd798fca97665e0e94656c3ee8

Timelineinfo

07/07/2025 Advisory disclosed
07/07/2025 +0 days VulDB entry created
02/02/2026 +210 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 711
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2025-7209 (🔒)
GCVE (CVE): GCVE-0-2025-7209
GCVE (VulDB): GCVE-100-315157
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/07/2025 14:52
Updated: 02/02/2026 18:26
Changes: 07/07/2025 14:52 (61), 07/09/2025 04:29 (1), 07/09/2025 14:27 (30), 02/02/2026 18:26 (12)
Complete: 🔍
Submitter: JJLeo
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #607685: 9fans plan9port plan9port-20250329 (commit 9da5b44) NULL Pointer Dereference (by JJLeo)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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