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Vulnerability record · CVE-2025-34324 · published 18 November 2025

CVE-2025-34324: Infocert gosign improper verification of cryptographic signature vulnerability

Infocert · Gosign

GoSign Desktop versions 2.4.0 and earlier use an unsigned update manifest for distributing application updates. The manifest contains package URLs and SHA-256 hashes but is not digitally signed, so its authenticity relies solely on the underlying TLS channel. In affected versions, TLS certificate validation can be disabled when a proxy is configured, allowing an attacker who can intercept network traffic to supply a malicious update manifest and corresponding package with a matching hash. This can cause the client to download and install a tampered update, resulting in arbitrary code execution with the privileges of the GoSign Desktop user on Windows and macOS, or with elevated privileges on some Linux deployments. A local attacker who can modify proxy settings may also abuse this behavior to escalate privileges by forcing installation of a crafted update.

7.0 CVSS 4.0 High EPSS 0.10% · top 99.1% CWE-347 · Improper verification of cryptographic signature
7.0CVSS 4.0 base score
0.10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

GoSign Desktop versions 2.4.0 and earlier use an unsigned update manifest for distributing application updates. The manifest contains package URLs and SHA-256 hashes but is not digitally signed, so its authenticity relies solely on the underlying TLS channel. In affected versions, TLS certificate validation can be disabled when a proxy is configured, allowing an attacker who can intercept network traffic to supply a malicious update manifest and corresponding package with a matching hash. This can cause the client to download and install a tampered update, resulting in arbitrary code execution with the privileges of the GoSign Desktop user on Windows and macOS, or with elevated privileges on some Linux deployments. A local attacker who can modify proxy settings may also abuse this behavior to escalate privileges by forcing installation of a crafted update.

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://infocert.digital/consumer/gosign-suite/ Product
https://www.ush.it/2025/11/14/multiple-vulnerabilities-gosign-desktop-remote-code-execution/ ExploitThird Party Advisory
https://www.ush.it/2025/11/14/vulnerabilita-multiple-gosign-desktop-esecuzione-remota-codice-arbitrario/ ExploitThird Party Advisory
https://www.vulncheck.com/advisories/gosign-desktop-insecure-update-mechanism-rce Third Party Advisory
https://www.ush.it/2025/11/14/multiple-vulnerabilities-gosign-desktop-remote-code-execution/ ExploitThird Party Advisory
https://www.ush.it/2025/11/14/vulnerabilita-multiple-gosign-desktop-esecuzione-remota-codice-arbitrario/ ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-34324), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.