VDB-326135 · CVE-2025-59362 · EUVD-2025-31363

Squid Web Proxy up to 7.1 lib/snmplib/asn1.c asn_build_objid encoding error

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Squid Web Proxy up to 7.1. It has been classified as problematic. The impacted element is the function asn_build_objid in the library lib/snmplib/asn1.c. The manipulation leads to encoding error. This vulnerability is referenced as CVE-2025-59362. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Squid Web Proxy up to 7.1. This issue affects the function asn_build_objid in the library lib/snmplib/asn1.c. The manipulation with an unknown input leads to a encoding error vulnerability. Using CWE to declare the problem leads to CWE-172. The product does not properly encode or decode the data, resulting in unexpected values. The impact remains unknown. The summary by CVE is:

Squid through 7.1 mishandles ASN.1 encoding of long SNMP OIDs. This occurs in asn_build_objid in lib/snmplib/asn1.c.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-59362 since 09/14/2025. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 266118 (Linux Distros Unpatched Vulnerability : CVE-2025-59362), 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 github.com.

The vulnerability is also documented in the databases at Tenable (266118), EUVD (EUVD-2025-31363) and CERT Bund (WID-SEC-2025-2143). Be aware that VulDB is the high quality source for vulnerability data.

Affected

Debian Linux
Amazon Linux 2
Ubuntu Linux
SUSE Linux
SUSE openSUSE
Open Source Squid

Productinfo

Type

Firewall Software

Vendor

Squid

Name

Web Proxy

Version

License

open-source

Website

Vendor: http://www.squid-cache.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Encoding error
CWE: CWE-172
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 266118
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-59362

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

09/14/2025 CVE reserved
09/26/2025 +12 days Advisory disclosed
09/26/2025 +0 days VulDB entry created
01/17/2026 +113 days VulDB entry last update

Sourcesinfo

Vendor: squid-cache.org

Advisory: github.com
Status: Confirmed

CVE: CVE-2025-59362 (🔒)
GCVE (CVE): GCVE-0-2025-59362
GCVE (VulDB): GCVE-100-326135
EUVD: 🔒
CERT Bund: WID-SEC-2025-2143 - Squid: Schwachstelle ermöglicht nicht spezifizierten Angriff

Entryinfo

Created: 09/26/2025 20:50
Updated: 01/17/2026 22:19
Changes: 09/26/2025 20:50 (56), 09/27/2025 21:27 (1), 09/29/2025 09:38 (7), 09/30/2025 05:32 (2), 10/10/2025 23:23 (2), 01/17/2026 22:19 (1)
Complete: 🔍
Cache ID: 216::103