VDB-104488 · CVE-2015-8013 · BID 77088

OpenPGP.js Authentication Mechanism s2k.js Messages cryptographic issue

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in OpenPGP.js. It has been declared as critical. Affected is an unknown function of the file s2k.js of the component Authentication Mechanism. Executing a manipulation as part of Messages can lead to cryptographic issue. This vulnerability appears as CVE-2015-8013. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in OpenPGP.js (JavaScript Library) (version now known). It has been declared as critical. This vulnerability affects some unknown processing of the file s2k.js of the component Authentication Mechanism. The manipulation as part of a Messages leads to a cryptographic issue vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

s2k.js in OpenPGP.js will decrypt arbitrary messages regardless of passphrase for crafted PGP keys which allows remote attackers to bypass authentication if message decryption is used as an authentication mechanism via a crafted symmetrically encrypted PGP message.

The bug was discovered 10/13/2015. The weakness was presented 07/25/2017 by Gijs Hollestelle (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2015-8013 since 10/28/2015. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1600.

The vulnerability was handled as a non-public zero-day exploit for at least 651 days. During that time the estimated underground price was around $0-$5k.

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 vulnerability database at SecurityFocus (BID 77088†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

JavaScript Library

Name

OpenPGP.js

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

10/13/2015 🔍
10/13/2015 +0 days 🔍
10/28/2015 +15 days 🔍
07/25/2017 +636 days 🔍
07/25/2017 +0 days 🔍
07/26/2017 +1 days 🔍
12/14/2022 +1967 days 🔍

Sourcesinfo

Advisory: 668a9bbe7033f3f475576209305eb57a54306d29
Researcher: Gijs Hollestelle
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8013 (🔍)
GCVE (CVE): GCVE-0-2015-8013
GCVE (VulDB): GCVE-100-104488
SecurityFocus: 77088 - Openpgp.js 's2k.js' Predictable Session Key Security Bypass Vulnerability

Entryinfo

Created: 07/26/2017 10:14
Updated: 12/14/2022 07:30
Changes: 07/26/2017 10:14 (64), 11/01/2019 09:33 (1), 12/14/2022 07:30 (4)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.