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CVE-2017-5334

Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26...

9.8 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

32.8%Up 30.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

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.

Record
CVE-2017-5334
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-415
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2017-5334
Updated
2026-11-02
EUVDEUVD-2017-14439 No score

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.

Record
EUVD-2017-14439
Updated
2026-11-03
GitHub AdvisoriesGHSA-xwcr-3xw9-7333 9.8

Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26...

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.

Record
GHSA-xwcr-3xw9-7333
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-415
Updated
2026-11-02
OSV 9.8

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.

Record
CVE-2017-5334
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2017-5334 9.8

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.

Record
DEBIAN-CVE-2017-5334
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVRHSA-2017:2292 8.1

Red Hat Security Advisory: gnutls security, bug fix, and enhancement update

Record
RHSA-2017:2292
CVSS 3.0
8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2017-5334 9.8

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.

Record
UBUNTU-CVE-2017-5334
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2017-0053 No score

Updated gnutls packages fix security vulnerability

Remote denial of service in SSL alert handling. (CVE-2016-8610)

In gnutls_x509_ext_import_proxy: if the language was set but the policy wasn't, that could lead to a double free. (CVE-2017-5334)

Decoding a specially crafted OpenPGP certificate could have lead to heap and stack overflows. (CVE-2017-5335, CVE-2017-5336 and CVE-2017-5337)

Record
MGASA-2017-0053
Updated
2026-11-02
OSVUSN-3183-1 No score

gnutls26, gnutls28 vulnerabilities

Stefan Buehler discovered that GnuTLS incorrectly verified the serial length of OCSP responses. A remote attacker could possibly use this issue to bypass certain certificate validation measures. This issue only applied to Ubuntu 16.04 LTS. (CVE-2016-7444)

Shi Lei discovered that GnuTLS incorrectly handled certain warning alerts. A remote attacker could possibly use this issue to cause GnuTLS to hang, resulting in a denial of service. This issue has only been addressed in Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-8610)

It was discovered that GnuTLS incorrectly decoded X.509 certificates with a Proxy Certificate Information extension. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2017-5334)

It was discovered that GnuTLS incorrectly handled certain OpenPGP certificates. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-5335, CVE-2017-5336, CVE-2017-5337)

Record
USN-3183-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gnutls28
Debian:12
 before 3.5.8-1
3.5.8-1
gnutls28
Debian:13
 before 3.5.8-1
3.5.8-1
gnutls28
Debian:14
 before 3.5.8-1
3.5.8-1
gnutls
Mageia:5
 before 3.2.21-1.3.mga5
3.2.21-1.3.mga5
gnutls-c++
Red Hat:enterprise_linux:7::client
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-debuginfo
Red Hat:enterprise_linux:7::client
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-devel
Red Hat:enterprise_linux:7::client
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls
Red Hat:enterprise_linux:7::client
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-dane
Red Hat:enterprise_linux:7::client
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-utils
Red Hat:enterprise_linux:7::client
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
Show 20 moreShow less
Affected packages
PackageAffectedFixed
gnutls-c++
Red Hat:enterprise_linux:7::computenode
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-debuginfo
Red Hat:enterprise_linux:7::computenode
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-devel
Red Hat:enterprise_linux:7::computenode
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls
Red Hat:enterprise_linux:7::computenode
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-dane
Red Hat:enterprise_linux:7::computenode
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-utils
Red Hat:enterprise_linux:7::computenode
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls
Red Hat:enterprise_linux:7::server
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-c++
Red Hat:enterprise_linux:7::server
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-dane
Red Hat:enterprise_linux:7::server
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-debuginfo
Red Hat:enterprise_linux:7::server
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-devel
Red Hat:enterprise_linux:7::server
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-utils
Red Hat:enterprise_linux:7::server
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls
Red Hat:enterprise_linux:7::workstation
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-c++
Red Hat:enterprise_linux:7::workstation
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-dane
Red Hat:enterprise_linux:7::workstation
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-debuginfo
Red Hat:enterprise_linux:7::workstation
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-devel
Red Hat:enterprise_linux:7::workstation
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls-utils
Red Hat:enterprise_linux:7::workstation
 before 0:3.3.26-9.el7
0:3.3.26-9.el7
gnutls28
Ubuntu:16.04:LTS
 before 3.4.10-4ubuntu1.2, plus listed versions
3.3.15-5ubuntu23.3.18-1ubuntu13.3.20-1ubuntu13.4.9-2ubuntu13.4.10-4ubuntu13.4.10-4ubuntu1.1
3.4.10-4ubuntu1.2
gnutls26
Ubuntu:14.04:LTS
 before 2.12.23-12ubuntu2.6, plus listed versions
2.12.23-1ubuntu42.12.23-1ubuntu52.12.23-12ubuntu12.12.23-12ubuntu22.12.23-12ubuntu2.1
Show 4 moreShow less
2.12.23-12ubuntu2.22.12.23-12ubuntu2.32.12.23-12ubuntu2.42.12.23-12ubuntu2.5
2.12.23-12ubuntu2.6

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-5334 is a critical vulnerability (CVSS 9.8) in Gnu Gnutls, published January 11, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 32.8%, the 98th percentile. Fixed in gnutls28 3.5.8-1.

References

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