GnuPG up to 2.2.7 mainproc.c data processing

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in GnuPG up to 2.2.7. This impacts an unknown function of the file mainproc.c. The manipulation results in data processing. This vulnerability is cataloged as CVE-2018-12020. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in GnuPG up to 2.2.7. Affected is an unknown part of the file mainproc.c. The manipulation with an unknown input leads to a data processing vulnerability. CWE is classifying the issue as CWE-19. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

mainproc.c in GnuPG before 2.2.8 mishandles the original filename during decryption and verification actions, which allows remote attackers to spoof the output that GnuPG sends on file descriptor 2 to other programs that use the "--status-fd 2" option. For example, the OpenPGP data might represent an original filename that contains line feed characters in conjunction with GOODSIG or VALIDSIG status codes.

The bug was discovered 06/08/2018. The weakness was shared 06/08/2018 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2018-12020 since 06/07/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 111113 (Scientific Linux Security Update : gnupg2 on SL7.x x86_64 (20180712)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Scientific Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197447 (Ubuntu Security Notification for Python-gnupg Vulnerabilities (USN-3964-1)).

Upgrading to version 2.2.8 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111113) and SecurityFocus (BID 104450†). The entries VDB-110197, VDB-110288, VDB-110317 and VDB-111303 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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: Data processing
CWE: CWE-19
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: 111113
Nessus Name: Scientific Linux Security Update : gnupg2 on SL7.x x86_64 (20180712)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Upgrade: GnuPG 2.2.8

Timelineinfo

06/07/2018 🔍
06/08/2018 +0 days 🔍
06/08/2018 +0 days 🔍
06/08/2018 +0 days 🔍
06/08/2018 +0 days 🔍
06/09/2018 +1 days 🔍
07/12/2018 +33 days 🔍
07/17/2018 +5 days 🔍
03/22/2023 +1709 days 🔍

Sourcesinfo

Advisory: RHSA-2018:2180
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-12020 (🔍)
GCVE (CVE): GCVE-0-2018-12020
GCVE (VulDB): GCVE-100-119304

OVAL: 🔍

SecurityFocus: 104450 - GnuPG CVE-2018-12020 Security Bypass Vulnerability
SecurityTracker: 1041051

See also: 🔍

Entryinfo

Created: 06/09/2018 10:27
Updated: 03/22/2023 10:17
Changes: 06/09/2018 10:27 (74), 07/23/2020 18:37 (5), 03/22/2023 10:17 (5)
Complete: 🔍
Cache ID: 216::103

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