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NVD / CVE Program· CNA debian

CVE-2017-5334: Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote…

CriticalCVSS 9.8 · v3.0—No exploit Fix available

Noroxi assessment

Priority: Plan (action score 49/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 32.7% (FIRST EPSS); higher than 98.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: gnutls28 (Debian:12) 3.5.8-1; gnutls (Red Hat:enterprise_linux:7::client) 0:3.3.26-9.el7; gnutls-c++ (Red Hat:enterprise_linux:7::client) 0:3.3.26-9.el7.

Add it to your regular patch cycle. Upgrade to gnutls28 (Debian:12) 3.5.8-1; gnutls (Red Hat:enterprise_linux:7::client) 0:3.3.26-9.el7; gnutls-c++ (Red Hat:enterprise_linux:7::client) 0:3.3.26-9.el7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attackers to have unspecified impact via crafted policy language information in an X.509 certificate with a Proxy Certificate Information extension.

Published
Mar 24, 2017
Updated
Jun 16, 2026
EPSS
32.7% · 98th percentile

Report tools

JSON

Action score

49

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
10 / 30 · 32.7%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2017-5334

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
gnugnutls
opensuseleap

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The GnuTLS version can't be seen from outside; the free SSL checker tests your certificate, enabled TLS versions and weak ciphers. Confirm the version on your server with the package manager.

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • gnu gnutlsup to 3.3.25 inclusive
  • gnu gnutls3.5.0
  • gnu gnutls3.5.1
  • gnu gnutls3.5.2
  • gnu gnutls3.5.3
  • gnu gnutls3.5.4
  • gnu gnutls3.5.5
  • gnu gnutls3.5.6
+3 more rows
  • gnu gnutls3.5.7
  • opensuse leap42.1
  • opensuse leap42.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12gnutls28before 3.5.8-13.5.8-1
Red Hat:enterprise_linux:7::clientgnutlsbefore 0:3.3.26-9.el70:3.3.26-9.el7
Red Hat:enterprise_linux:7::clientgnutls-c++before 0:3.3.26-9.el70:3.3.26-9.el7
Red Hat:enterprise_linux:7::clientgnutls-danebefore 0:3.3.26-9.el70:3.3.26-9.el7
Red Hat:enterprise_linux:7::clientgnutls-debuginfobefore 0:3.3.26-9.el70:3.3.26-9.el7
Red Hat:enterprise_linux:7::clientgnutls-develbefore 0:3.3.26-9.el70:3.3.26-9.el7
Red Hat:enterprise_linux:7::clientgnutls-utilsbefore 0:3.3.26-9.el70:3.3.26-9.el7

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-3829A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7.
    48Plan
  • CVE-2008-1948The _gnutls_server_name_recv_params function in lib/ext_server_name.c in libgnutls in gnutls-serv in GnuTLS before 2.2.4 does not properly…
    44Plan
  • CVE-2017-5337Multiple heap-based buffer overflows in the read_attribute function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers…
    41Plan

Published before and after this one in the same product

  • ← EarlierCVE-2015-3308Sep 2, 2015 · Double free vulnerability in lib/x509/x509_ext.c in GnuTLS before 3.3.14 allows remote attackers to cause a denial of service or possibly…
    31Monitor
  • ← EarlierCVE-2016-7444Sep 27, 2016 · The gnutls_ocsp_resp_check_crt function in lib/x509/ocsp.c in GnuTLS before 3.4.15 and 3.5.x before 3.5.4 does not verify the serial length…
    31Monitor
  • Later →CVE-2017-5335Mar 24, 2017 · The stream reading functions in lib/opencdk/read-packet.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to cause a…
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:gnutls283.5.8-1 · Debian:12Package registry (OSV)
red hat:gnutls0:3.3.26-9.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:gnutls-c++0:3.3.26-9.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:gnutls-dane0:3.3.26-9.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:gnutls-debuginfo0:3.3.26-9.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:gnutls-devel0:3.3.26-9.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:gnutls-utils0:3.3.26-9.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Not on record for this CVE: researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records