What’s Vulnerable › Vulnerabilities

CVE-2020-27743

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-26 · updated 2026-06-17
• Weakness: CWE-330

Description

libtac in pam_tacplus through 1.5.1 lacks a check for a failure of RAND_bytes()/RAND_pseudo_bytes(). This could lead to use of a non-random/predictable session_id.

Affected products

• Pam Tacplus Project Pam Tacplus: through 1.5.1

References

• https://github.com/kravietz/pam_tacplus/pull/163
• https://tools.ietf.org/html/rfc8907
• https://github.com/kravietz/pam_tacplus/pull/163
• https://tools.ietf.org/html/rfc8907

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