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CVE-2017-5334

40
FAUCET Score

CVE-2017-5334 is a critical double free vulnerability in the gnutls_x509_ext_import_proxy function of GnuTLS versions before 3.3.26 and 3.5.8, affecting products like GNU GnuTLS and OpenSUSE. This flaw allows remote attackers to achieve high impact on confidentiality, integrity, and availability through crafted X.509 certificates containing Proxy Certificate Information extensions, earning a CVSS score of 9.8. While no public exploits (Metasploit, Nuclei, ExploitDB) are currently available and it's not listed in CISA's KEV catalog, its high FAUCET Risk Score and notable community discussion and media coverage suggest potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
42.2CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.2:*:*:*:*:*:*:*
<= 3.3.25CPE matchmatch criteria
cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*
3.5.0CPE matchmatch criteria
cpe:2.3:a:gnu:gnutls:3.5.0:*:*:*:*:*:*:*
3.5.1CPE matchmatch criteria
cpe:2.3:a:gnu:gnutls:3.5.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
32.75%
Probability of exploitation in next 30 days
EPSS Percentile
98.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.3275 is in the 95th percentile among its peer group of 36,829 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

gentoopatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: gnutls-0:3.3.26-9.el7
View patch

Vendor Advisories (1)

redhatCVE-2017-5334Moderate

gnutls: Double-free while decoding crafted X.509 certificates

Jan 10, 2017

References

lists.opensuse.org / opensuse-security-announce/2017-02/msg00005.html
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2292
gitlab.com / gnutls/gnutls/commit/c5aaa488a3d6df712dc8dff23a049133cab5ec1b
Issue TrackingPatchThird Party Advisory
gnutls.org / security.html
Vendor Advisory
security.gentoo.org / glsa/201702-04
PatchThird Party AdvisoryVendor Advisory
openwall.com / lists/oss-security/2017/01/10/7
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2017/01/11/4
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/95370
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037576
Third Party AdvisoryVDB Entry