CVE-2025-34324: Infocert Gosign privilege escalation (CVSS 7.8)

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 3.1 breakdown

Attack vectorLocal

Attack complexityLow

Privileges requiredNone

User interactionRequired

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Infocert Gosign< 2.4.1

Remediation

Fixed in

Infocert Gosign≥ 2.4.1

References

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-rceThird Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-34324 being actively exploited?

CVE-2025-34324 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.10%.

How severe is CVE-2025-34324?

CVE-2025-34324 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.10% probability of exploitation.

Which products are affected by CVE-2025-34324?

Affected products include Infocert Gosign.

How do I fix CVE-2025-34324?

Upgrade affected software to a fixed version, for example Infocert Gosign 2.4.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-34324 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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