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Devscripts CVE-2025-8454

CRITICAL
Improper Verification of Cryptographic Signature (CWE-347)
2025-08-01 security@debian.org
Information Disclosure Debian Jwt Attack Suse Devscripts
9.8
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
CWE-347
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Signature verification
Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.04%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.
This Week Schedule remediation this week. Why: CRITICAL severity.
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

It was discovered that uscan, a tool to scan/watch upstream sources for new releases of software, included in devscripts (a collection of scripts to make the life of a Debian Package maintainer. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-347. It was discovered that uscan, a tool to scan/watch upstream sources for new releases of software, included in devscripts (a collection of scripts to make the life of a Debian Package maintainer easier), skips OpenPGP verification if the upstream source is already downloaded from a previous run even if the verification failed back then. Affected products include: Debian Devscripts.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SUSE CRITICAL

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Patch released
Apr 09, 2026 - 08:30 nvd
Patch available
CVE Published
Aug 01, 2025 - 06:15 nvd
CRITICAL 9.8

DescriptionCVE.org

It was discovered that uscan, a tool to scan/watch upstream sources for new releases of software, included in devscripts (a collection of scripts to make the life of a Debian Package maintainer easier), skips OpenPGP verification if the upstream source is already downloaded from a previous run even if the verification failed back then.

Executive ViewAI

Why It Matters

CVE-2025-8454 presents critical security risk, a signature bypass vulnerability rated CVSS 9.8. Successful exploitation could critically impact the confidentiality, integrity, and availability of affected systems. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.

Business Impact: Severe
Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score
0.0%
Top 89% exploitable

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Out-of-Cycle
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Very High

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:debian:devscripts:2.25.15:*:*:*:*:*:*:*

More in Devscripts

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CVE-2012-0212 CRITICAL
9.3 Jun 16

debdiff.pl in devscripts 2.10.x before 2.10.69 and 2.11.x before 2.11.4 allows remote attackers to execute arbitrary cod
CVE-2012-0211 CRITICAL
9.3 Jun 16

debdiff.pl in devscripts 2.10.x before 2.10.69 and 2.11.x before 2.11.4 allows remote attackers to execute arbitrary cod
CVE-2012-0210 CRITICAL
9.3 Jun 16

debdiff.pl in devscripts 2.10.x before 2.10.69 and 2.11.x before 2.11.4 allows remote attackers to obtain system informa
CVE-2013-7085 MEDIUM POC
5.8 Dec 14

Uscan in devscripts 2.13.5, when USCAN_EXCLUSION is enabled, allows remote attackers to delete arbitrary files via a whi
CVE-2018-13043 CRITICAL
9.8 Jul 01

scripts/grep-excuses.pl in Debian devscripts through 2.18.3 allows code execution through unsafe YAML loading because YA
CVE-2013-6888 HIGH
7.5 Jan 07

Uscan in devscripts before 2.13.9 allows remote attackers to execute arbitrary code via a crafted tarball. Rated high se
CVE-2015-5704 HIGH
7.8 Sep 25

scripts/licensecheck.pl in devscripts before 2.15.7 allows local users to execute arbitrary shell commands. Rated high s
CVE-2012-2240 HIGH
7.5 Oct 01

scripts/dscverify.pl in devscripts before 2.12.3 allows remote attackers to execute arbitrary commands via unspecified v
CVE-2015-5705 HIGH
7.5 Sep 06

Argument injection vulnerability in devscripts before 2.15.7 allows remote attackers to write to arbitrary files via a c
CVE-2013-7050 MEDIUM
6.8 Dec 13

The get_main_source_dir function in scripts/uscan.pl in devscripts before 2.13.8, when using USCAN_EXCLUSION, allows rem
CVE-2012-2242 MEDIUM
6.8 Oct 01

scripts/dget.pl in devscripts before 2.10.73 allows remote attackers to execute arbitrary commands via a crafted (1) .ds
CVE-2014-1833 MEDIUM
5.0 Feb 05

Directory traversal vulnerability in uupdate in devscripts 2.14.1 allows remote attackers to modify arbitrary files via

Same weakness CWE-347 – Improper Verification of Cryptographic Signature

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CVE-2025-68613 HIGH POC
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CVE-2015-1701 HIGH POC
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CVE-2017-0147 HIGH POC
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Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Development Tools 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP7 Fixed
SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed

References

Advisories & patches
REF https://bugs.debian.org/1109251

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