VDB-334485 · CVE-2025-6966 · EUVD-2025-201407

Canonical python-apt deb822 File TagSection.keys null pointer dereference

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4.4	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Canonical python-apt. This affects the function TagSection.keys of the component deb822 File Handler. Performing a manipulation results in null pointer dereference. This vulnerability is known as CVE-2025-6966. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in Canonical python-apt (the affected version is unknown). This affects the function TagSection.keys of the component deb822 File Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key.

The weakness was published by Julian Andres Klode. The advisory is shared at bugs.launchpad.net. This vulnerability is uniquely identified as CVE-2025-6966 since 07/01/2025. The exploitability is told to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 278731 (Debian dla-4408 : python-apt-common - security update), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (278731) and EUVD (EUVD-2025-201407). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Programming Language Software

Vendor

Canonical

Name

python-apt

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

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: 278731
Nessus Name: Debian dla-4408 : python-apt-common - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/01/2025 CVE reserved
12/05/2025 +157 days Advisory disclosed
12/05/2025 +0 days VulDB entry created
01/08/2026 +34 days VulDB entry last update

Sourcesinfo

Advisory: bugs.launchpad.net
Researcher: Julian Andres Klode
Status: Confirmed

CVE: CVE-2025-6966 (🔒)
GCVE (CVE): GCVE-0-2025-6966
GCVE (VulDB): GCVE-100-334485
EUVD: 🔒

Entryinfo

Created: 12/05/2025 15:40
Updated: 01/08/2026 06:12
Changes: 12/05/2025 15:40 (67), 12/08/2025 15:19 (1), 12/08/2025 15:32 (1), 12/16/2025 09:17 (2), 01/08/2026 06:12 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.