CVE-2025-6297: dpkg DoS — Fix

Description

It was discovered that dpkg-deb does not properly sanitize directory permissions when extracting a control member into a temporary directory, which is documented as being a safe operation even on untrusted data. This may result in leaving temporary files behind on cleanup. Given automated and repeated execution of dpkg-deb commands on adversarial .deb packages or with well compressible files, placed inside a directory with permissions not allowing removal by a non-root user, this can end up in a DoS scenario due to causing disk quota exhaustion or disk full conditions.

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CVSS v3.1 Score

8.2

HIGH

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

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-732 CWE-732

Affected Products

Vendor	Product	Versions
debian	dpkg	< 1.22.21

References

Advisories & Patches

https://git.dpkg.org/cgit/dpkg/dpkg.git/commit/?id=ed6bbd445dd8800308c67236ba35d08004c98e82

Frequently Asked Questions

What is CVE-2025-6297? +

It was discovered that dpkg-deb does not properly sanitize directory permissions when extracting a control member into a temporary directory, which is documented as being a safe operation even on untrusted data. This may result in leaving temporary files behind on cleanup. Given automated and repeated execution of dpkg-deb commands on adversarial .deb packages or with well compressible files, placed inside a directory with permissions not allowing removal by a non-root user, this can end up in a DoS scenario due to causing disk quota exhaustion or disk full conditions. It has a CVSS v3.1 base score of 8.2 (HIGH).

How severe is CVE-2025-6297? +

CVE-2025-6297 has a CVSS v3.1 score of 8.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-6297? +

CVE-2025-6297 affects products from debian, specifically: dpkg. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-6297? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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