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CVE-2020-27743

Good to know:

Date: November 2, 2020

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.

Language: C

Severity Score

9.8

Related Resources (5)

Url: https://github.com/kravietz/pam_tacplus/pull/163

Url: https://nvd.nist.gov/vuln/detail/CVE-2020-27743

Url: https://tools.ietf.org/html/rfc8907

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2020-27743

Url: https://www.mend.io/vulnerability-database/CVE-2020-27743

Severity Score

9.8

Weakness Type (CWE)

Use of Insufficiently Random Values

CWE-330

Top Fix

Upgrade Version

Upgrade to version 1.6.1

CVSS v3.1

Base Score:	9.8
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	HIGH

CVSS v2

Base Score:	7.5
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	PARTIAL
Availability (A):	PARTIAL
Additional information:

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