GnuPG up to 1.4.18/2.0.26/2.1.1 Sign Extension kbx/keybox-search.c Keyring File input validation

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.
5.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in GnuPG up to 1.4.18/2.0.26/2.1.1 and classified as critical. This vulnerability affects unknown code of the file kbx/keybox-search.c of the component Sign Extension. Performing a manipulation as part of Keyring File results in input validation. This vulnerability is known as CVE-2015-1607. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in GnuPG up to 1.4.18/2.0.26/2.1.1. It has been classified as critical. This affects an unknown part of the file kbx/keybox-search.c of the component Sign Extension. The manipulation as part of a Keyring File leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

kbx/keybox-search.c in GnuPG before 1.4.19, 2.0.x before 2.0.27, and 2.1.x before 2.1.2 does not properly handle bitwise left-shifts, which allows remote attackers to cause a denial of service (invalid read operation) via a crafted keyring file, related to sign extensions and "memcpy with overlapping ranges."

The bug was discovered 02/14/2015. The weakness was published 11/20/2019 by Hanno Böck. This vulnerability is uniquely identified as CVE-2015-1607 since 02/14/2015. 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 of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 46 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 82526 (Ubuntu 10.04 LTS / 12.04 LTS / 14.04 LTS / 14.10 : gnupg, gnupg2 vulnerabilities (USN-2554-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 123825 (Solaris 11.2 Support Repository Update (SRU) 13.6.0 Missing).

Upgrading to version 1.4.19, 2.0.27 or 2.1.2 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (82526) and SecurityFocus (BID 72610†). Similar entry is available at VDB-145994. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 82526
Nessus Name: Ubuntu 10.04 LTS / 12.04 LTS / 14.04 LTS / 14.10 : gnupg, gnupg2 vulnerabilities (USN-2554-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for gnupg USN-2554-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: GnuPG 1.4.19/2.0.27/2.1.2
Patch: 2183683bd633818dd031b090b5530951de76f392

Timelineinfo

02/13/2015 🔍
02/14/2015 +1 days 🔍
02/14/2015 +0 days 🔍
04/01/2015 +46 days 🔍
04/02/2015 +1 days 🔍
11/20/2019 +1693 days 🔍
11/21/2019 +1 days 🔍
11/24/2024 +1830 days 🔍

Sourcesinfo

Advisory: usn-2554-1
Researcher: Hanno Böck
Status: Confirmed

CVE: CVE-2015-1607 (🔍)
GCVE (CVE): GCVE-0-2015-1607
GCVE (VulDB): GCVE-100-145995
SecurityFocus: 72610 - Gnupg2 CVE-2015-1607 Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 11/21/2019 07:53
Updated: 11/24/2024 05:27
Changes: 11/21/2019 07:53 (45), 11/21/2019 07:58 (31), 02/23/2024 22:02 (7), 11/24/2024 05:27 (19)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!