GnuPG up to 1.7.2 Random Number Generator information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in GnuPG up to 1.7.2. This issue affects some unknown processing of the component Random Number Generator. Performing a manipulation results in information disclosure. This vulnerability is identified as CVE-2016-6313. The attack is only possible with local access. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in GnuPG up to 1.7.2. This affects some unknown processing of the component Random Number Generator. 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 weakness was released 08/17/2016 by Felix Dörre and Vladimir Klebanov as Security fixes for Libgcrypt and GnuPG 1.4 (Mailing List). It is possible to read the advisory at lists.gnupg.org. The public release was coordinated with the project team. This vulnerability is uniquely identified as CVE-2016-6313. The exploitability is told to be easy. Attacking locally is a requirement. Required for exploitation is a authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 93018 (Debian DSA-3649-1 : gnupg - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351328 (Amazon Linux Security Advisory for gnupg: AL2012-2018-252).

Upgrading to version 1.4.21 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (93018), SecurityFocus (BID 92527†) and SecurityTracker (ID 1036635†). Further details are available at youtube.com. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

Video

Youtube: Not available anymore

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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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: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 93018
Nessus Name: Debian DSA-3649-1 : gnupg - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 880021
OpenVAS Name: Fedora Update for gnupg FEDORA-2016-9864953aa3
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: GnuPG 1.4.21

Timelineinfo

07/26/2016 🔍
08/17/2016 +22 days 🔍
08/17/2016 +0 days 🔍
08/17/2016 +0 days 🔍
08/17/2016 +0 days 🔍
08/18/2016 +1 days 🔍
12/13/2016 +117 days 🔍
09/14/2022 +2101 days 🔍

Sourcesinfo

Advisory: Security fixes for Libgcrypt and GnuPG 1.4
Researcher: Felix Dörre, Vladimir Klebanov
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2016-6313 (🔍)
GCVE (CVE): GCVE-0-2016-6313
GCVE (VulDB): GCVE-100-90831

OVAL: 🔍

SecurityFocus: 92527 - GnuPG and Libgcrypt CVE-2016-6313 Local Predictable Random Number Generator Weakness
SecurityTracker: 1036635 - GnuPG Flaw in Random Number Generator Mixing Functions Lets Users Predict Some Output

Misc.: 🔍

Entryinfo

Created: 08/18/2016 10:19
Updated: 09/14/2022 07:21
Changes: 08/18/2016 10:19 (47), 08/09/2019 15:37 (25), 09/14/2022 07:09 (3), 09/14/2022 07:15 (11), 09/14/2022 07:21 (1)
Complete: 🔍
Cache ID: 216::103

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