sequoia-pgp sequoia up to 2.0.x PKESK aes_key_unwrap signed to unsigned conversion error

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in sequoia-pgp sequoia up to 2.0.x. This vulnerability affects the function aes_key_unwrap of the component PKESK Handler. Performing a manipulation results in signed to unsigned conversion error. This vulnerability is known as CVE-2025-67897. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in sequoia-pgp sequoia up to 2.0.x. This affects the function aes_key_unwrap of the component PKESK Handler. The manipulation with an unknown input leads to a signed to unsigned conversion error vulnerability. CWE is classifying the issue as CWE-195. The product uses a signed primitive and performs a cast to an unsigned primitive, which can produce an unexpected value if the value of the signed primitive can not be represented using an unsigned primitive. This is going to have an impact on availability. The summary by CVE is:

In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet.

The advisory is shared at gitlab.com. This vulnerability is uniquely identified as CVE-2025-67897 since 12/14/2025. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 278628 (Linux Distros Unpatched Vulnerability : CVE-2025-67897), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.1.0 eliminates this vulnerability. Applying the patch b59886e5e7bdf7169ed330f309a6633d131776e5 is able to eliminate this problem. The bugfix is ready for download at gitlab.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (278628) and EUVD (EUVD-2025-203279). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.1

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (MITRE): 🔒

CVSSv2info

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

Exploitinginfo

Class: Signed to unsigned conversion error
CWE: CWE-195 / CWE-194 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 278628
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-67897

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: sequoia 2.1.0
Patch: b59886e5e7bdf7169ed330f309a6633d131776e5

Timelineinfo

12/14/2025 Advisory disclosed
12/14/2025 +0 days CVE reserved
12/14/2025 +0 days VulDB entry created
12/14/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: b59886e5e7bdf7169ed330f309a6633d131776e5
Status: Confirmed

CVE: CVE-2025-67897 (🔒)
GCVE (CVE): GCVE-0-2025-67897
GCVE (VulDB): GCVE-100-336405
EUVD: 🔒

Entryinfo

Created: 12/14/2025 10:21
Updated: 12/14/2025 21:33
Changes: 12/14/2025 10:21 (67), 12/14/2025 15:45 (1), 12/14/2025 21:33 (2)
Complete: 🔍
Cache ID: 216::103

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

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