Libgcrypt/GnuPG prior 1.6.3 Elgamal Decryption information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Libgcrypt and GnuPG. The impacted element is an unknown function of the component Elgamal Decryption. Performing a manipulation results in information disclosure. This vulnerability is known as CVE-2014-3591. The attack may be carried out on the physical device. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Libgcrypt and GnuPG. This affects some unknown functionality of the component Elgamal Decryption. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Libgcrypt before 1.6.3 and GnuPG before 1.4.19 does not implement ciphertext blinding for Elgamal decryption, which allows physically proximate attackers to obtain the server's private key by determining factors using crafted ciphertext and the fluctuations in the electromagnetic field during multiplication.

The bug was discovered 01/04/2016. The weakness was published 11/29/2019. This vulnerability is uniquely identified as CVE-2014-3591. The exploitability is told to be difficult. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 153 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 91481 (GLSA-201606-04 : GnuPG: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351377 (Amazon Linux Security Advisory for libgcrypt: AL2012-2018-256).

Upgrading to version 1.6.3 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 (91481) and SecurityFocus (BID 73064†). Similar entry is available at VDB-146507. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 2.0
VulDB Temp Score: 1.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.2
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91481
Nessus Name: GLSA-201606-04 : GnuPG: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: ALAS-2015-577
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Libgcrypt/GnuPG 1.6.3

Timelineinfo

05/14/2014 🔍
01/04/2016 +600 days 🔍
06/05/2016 +153 days 🔍
06/06/2016 +1 days 🔍
11/29/2019 +1271 days 🔍
12/03/2019 +4 days 🔍
12/02/2024 +1826 days 🔍

Sourcesinfo

Advisory: cs.tau.ac.il
Status: Confirmed

CVE: CVE-2014-3591 (🔍)
GCVE (CVE): GCVE-0-2014-3591
GCVE (VulDB): GCVE-100-146505

OVAL: 🔍

SecurityFocus: 73064

See also: 🔍

Entryinfo

Created: 12/03/2019 15:52
Updated: 12/02/2024 03:54
Changes: 12/03/2019 15:52 (41), 12/03/2019 15:57 (27), 03/05/2024 08:37 (5), 06/08/2024 00:47 (15), 12/02/2024 03:54 (5)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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