Yubico pam-u2f 1.0.7 auth File Parser u2f_keys Symlink Log information disclosure

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 (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Yubico pam-u2f 1.0.7. Affected by this issue is some unknown functionality of the file HOME/.config/Yubico/u2f_keys of the component auth File Parser. Performing a manipulation as part of Symlink results in information disclosure (Log). This vulnerability is cataloged as CVE-2019-12209. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Yubico pam-u2f 1.0.7. This affects some unknown processing of the file HOME/.config/Yubico/u2f_keys of the component auth File Parser. The manipulation as part of a Symlink leads to a information disclosure vulnerability (Log). 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:

Yubico pam-u2f 1.0.7 attempts parsing of the configured authfile (default $HOME/.config/Yubico/u2f_keys) as root (unless openasuser was enabled), and does not properly verify that the path lacks symlinks pointing to other files on the system owned by root. If the debug option is enabled in the PAM configuration, part of the file contents of a symlink target will be logged, possibly revealing sensitive information.

The weakness was shared 06/04/2019 (Website). It is possible to read the advisory at developers.yubico.com. This vulnerability is uniquely identified as CVE-2019-12209 since 05/20/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entry VDB-135940 is related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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

Name: Log
Class: Information disclosure / Log
CWE: CWE-200 / CWE-284 / CWE-266
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: 🔍

Patch: github.com

Timelineinfo

05/20/2019 🔍
06/04/2019 +15 days 🔍
06/05/2019 +1 days 🔍
09/27/2023 +1574 days 🔍

Sourcesinfo

Product: github.com

Advisory: 7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3
Status: Not defined

CVE: CVE-2019-12209 (🔍)
GCVE (CVE): GCVE-0-2019-12209
GCVE (VulDB): GCVE-100-135939
See also: 🔍

Entryinfo

Created: 06/05/2019 07:21
Updated: 09/27/2023 00:21
Changes: 06/05/2019 07:21 (41), 12/02/2019 12:30 (17), 09/27/2023 00:07 (4), 09/27/2023 00:21 (1)
Complete: 🔍
Cache ID: 216::103

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

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