yarnpkg up to 2018-06-05 Signature install.sh signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in yarnpkg up to 2018-06-05 and classified as critical. Affected is an unknown function of the file install.sh of the component Signature. This manipulation causes signature verification. This vulnerability is registered as CVE-2018-12556. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in yarnpkg up to 2018-06-05. Affected by this vulnerability is an unknown part of the file install.sh of the component Signature. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The signature verification routine in install.sh in yarnpkg/website through 2018-06-05 only verifies that the yarn release is signed by any (arbitrary) key in the local keyring of the user, and does not pin the signature to the yarn release key, which allows remote attackers to sign tampered yarn release packages with their own key.

The bug was discovered 03/21/2019. The weakness was published 05/16/2019 as not defined mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. This vulnerability is known as CVE-2018-12556 since 06/18/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 56 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.

Similar entries are available at VDB-130741, VDB-130743, VDB-134133 and VDB-135166. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

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

NVD Base Score: 5.9
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: Signature verification
CWE: CWE-347 / CWE-345
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/18/2018 🔍
03/21/2019 +276 days 🔍
05/16/2019 +56 days 🔍
05/17/2019 +1 days 🔍
09/21/2023 +1588 days 🔍

Sourcesinfo

Advisory: 152703
Status: Not defined

CVE: CVE-2018-12556 (🔍)
GCVE (CVE): GCVE-0-2018-12556
GCVE (VulDB): GCVE-100-135145
See also: 🔍

Entryinfo

Created: 05/17/2019 07:17
Updated: 09/21/2023 14:29
Changes: 05/17/2019 07:17 (58), 06/13/2020 09:03 (1), 09/21/2023 14:29 (3)
Complete: 🔍
Cache ID: 216::103

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

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