File Descriptor Leak in Yubico PAM Module
CVE-2019-12210

8.1HIGH

Key Information:

Vendor

Yubico

Status
Pam-u2f
Vendor
CVE Published:
4 June 2019

What is CVE-2019-12210?

In version 1.0.7 of Yubico's pam-u2f module, a security flaw exists when the module is set to debug mode with a custom debug log file. The specified file descriptor remains open and is inherited by any child processes spawned. This oversight allows these child processes to both read from and write to the debug log file, which has the potential to leak sensitive information. Furthermore, this can lead to denial of service if the log file is filled with junk data, or it could be exploited to inject misleading information.

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References

https://developers.yubico.com/pam-u2f/Release_Notes.html
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https://github.com/Yubico/pam-u2f/commit/18b1914e32b74ff5...
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http://www.openwall.com/lists/oss-security/2019/06/05/1
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CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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