7.5

CVE-2016-4456: gnu gnutls Improper Input Validation

CVSS: 7.5v3.1HighModified
AliasesDEBIAN-CVE-2016-4456
Published 08-08-2017Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2016-4456 is a high (CVSS 7.5) Improper Input Validation vulnerability in gnu gnutls. EPSS estimates a 2.20% chance of exploitation in the next 30 days, higher than 82.2% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
2.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-08-2017
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.20%

Chance of exploitation in the next 30 days

Percentile

82%

Versus all other CVEs

30-day change

0.00 pp

From 2.20% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • gnutls28< 3.4.13-1
Gnu1 product

2 vendors · 2 products

References

3 links