CVE-2016-4456 : The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote atta

The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite and corrupt arbitrary files in the filesystem.

Published 2017-08-08 21:29:00

Updated 2020-06-16 18:30:37

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2016-4456

GNU » Gnutls » Version: 3.4.12
cpe:2.3:a:gnu:gnutls:3.4.12:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.17%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 54 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

http://www.openwall.com/lists/oss-security/2016/06/07/6

oss-security - Re: CVE Request: GnuTLS: GNUTLS-SA-2016-1: File overwrite by setuid programs
Mailing List;Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1343505

1343505 – (CVE-2016-4456) CVE-2016-4456 gnutls: Environment variable GNUTLS_KEYLOGFILE is obtained via insecure getenv()
Issue Tracking;Third Party Advisory

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