GNU libbmicrohttpd up to 1.0.2 Packet heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in GNU libbmicrohttpd up to 1.0.2. Impacted is an unknown function of the component Packet Handler. The manipulation leads to heap-based overflow. This vulnerability is referenced as CVE-2025-62689. Remote exploitation of the attack is possible. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in GNU libbmicrohttpd up to 1.0.2 and classified as critical. This issue affects some unknown functionality of the component Packet Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to 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(). Impacted is availability. The summary by CVE is:

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

It is possible to read the advisory at gnu.org. The identification of this vulnerability is CVE-2025-62689 since 11/04/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 274577 (Linux Distros Unpatched Vulnerability : CVE-2025-62689), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.gnunet.org.

The vulnerability is also documented in the databases at Tenable (274577) and EUVD (EUVD-2025-41746). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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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: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (jpcert): 🔒

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: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 274577
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-62689

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: git.gnunet.org

Timelineinfo

11/04/2025 CVE reserved
11/10/2025 +6 days Advisory disclosed
11/10/2025 +0 days VulDB entry created
11/11/2025 +1 days VulDB entry last update

Sourcesinfo

Vendor: gnu.org

Advisory: gnu.org
Status: Confirmed

CVE: CVE-2025-62689 (🔒)
GCVE (CVE): GCVE-0-2025-62689
GCVE (VulDB): GCVE-100-331655
EUVD: 🔒

Entryinfo

Created: 11/10/2025 07:42
Updated: 11/11/2025 01:59
Changes: 11/10/2025 07:42 (77), 11/10/2025 10:27 (1), 11/11/2025 01:59 (2)
Complete: 🔍
Cache ID: 216::103

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