gnutls: Environment variable GNUTLS_KEYLOGFILE is obtained via insecure getenv()
Published Aug 8, 2017
7.5
HIGHCVSS 3.1
EPSS 2.20%
Description
The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite and corrupt arbitrary files in the filesystem.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
gnutls
Not affected
Red Hat Enterprise Linux 6
gnutls
Not affected
Red Hat Enterprise Linux 7
gnutls
Not affected
Red Hat Enterprise Virtualization 3
mingw-virt-viewer
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | gnutls | Not affected | n/a |
| Red Hat Enterprise Linux 6 | gnutls | Not affected | n/a |
| Red Hat Enterprise Linux 7 | gnutls | Not affected | n/a |
| Red Hat Enterprise Virtualization 3 | mingw-virt-viewer | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
AV:N/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.20% (0.02200) | 81.87th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.20% (0.02200) | 80.13th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.28% (0.00284) | 49.79th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.17% (0.00173) | 55.67th | v3 (v2023.03.01) |
| Jun 18, 2023 | 0.17% (0.00173) | 53.22th | v3 (v2023.03.01) |
| May 8, 2023 | 0.16% (0.00160) | 51.13th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.21% (0.00206) | 56.79th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
References (6)
- http://gnutls.org/security.html#GNUTLS-SA-2016-1
- http://www.openwall.com/lists/oss-security/2016/06/07/6 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-4456 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1343505 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-4456
- https://www.cve.org/CVERecord?id=CVE-2016-4456
| Link | Providers | Tags |
|---|---|---|
| http://gnutls.org/security.html#GNUTLS-SA-2016-1 | ||
| http://www.openwall.com/lists/oss-security/2016/06/07/6 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2016-4456 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1343505 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-4456 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-4456 |
Change history (0)
No recorded changes yet.