high
7.5
CWE
476
Advisory Published
Updated

CVE-2019-5010: Null Pointer Dereference

First published: Tue Jan 15 2019(Updated: )

An exploitable denial-of-service vulnerability exists in the X509 certificate parser of Python.org Python 2.7.11 / 3.6.6. A specially crafted X509 certificate can cause a NULL pointer dereference, resulting in a denial of service. An attacker can initiate or accept TLS connections using crafted certificates to trigger this vulnerability.

Credit: talos-cna@cisco.com talos-cna@cisco.com

Affected SoftwareAffected VersionHow to fix
redhat/python<0:2.7.5-86.el7
0:2.7.5-86.el7
redhat/python3<0:3.6.8-15.1.el8
0:3.6.8-15.1.el8
redhat/rh-python36-python<0:3.6.9-2.el6
0:3.6.9-2.el6
redhat/rh-python36-python<0:3.6.9-2.el7
0:3.6.9-2.el7
Python Python>=2.7.0<2.7.16
Python Python>=3.4.0<3.4.10
Python Python>=3.5.0<3.5.7
Python Python>=3.6.0<3.6.9
Python Python>=3.7.0<3.7.3
openSUSE Leap=15.1
Debian Debian Linux=9.0
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux Eus=8.1
Redhat Enterprise Linux Eus=8.2
Redhat Enterprise Linux Eus=8.4
Redhat Enterprise Linux Eus=8.6
Redhat Enterprise Linux Server Aus=8.2
Redhat Enterprise Linux Server Aus=8.4
Redhat Enterprise Linux Server Aus=8.6
Redhat Enterprise Linux Server Tus=8.2
Redhat Enterprise Linux Server Tus=8.4
Redhat Enterprise Linux Server Tus=8.6
ubuntu/python2.7<2.7.15-4ubuntu4~18.04.1
2.7.15-4ubuntu4~18.04.1
ubuntu/python2.7<2.7.16-2~18.10
2.7.16-2~18.10
ubuntu/python2.7<2.7.16
2.7.16
ubuntu/python2.7<2.7.12-1ubuntu0~16.04.8
2.7.12-1ubuntu0~16.04.8
ubuntu/python3.4<3.4.3-1ubuntu1~14.04.7+
3.4.3-1ubuntu1~14.04.7+
ubuntu/python3.5<3.5.2-2ubuntu0~16.04.8
3.5.2-2ubuntu0~16.04.8
ubuntu/python3.6<3.6.8-1~18.04.2
3.6.8-1~18.04.2
ubuntu/python3.7<3.7.2-2
3.7.2-2
debian/python2.7
2.7.16-2+deb10u1
2.7.16-2+deb10u4
2.7.18-8+deb11u1
debian/python3.7
3.7.3-2+deb10u3
3.7.3-2+deb10u7

Remedy

https://github.com/python/cpython/commit/06b15424b0dcacb1c551b2a36e739fffa8d0c595

Remedy

https://github.com/python/cpython/commit/6c655ce34ae54adb8eef22b73108e22cc381cb8d

Remedy

https://github.com/python/cpython/commit/efec7631edf3b9480dc3988c97ffef94df8800da

Remedy

https://github.com/python/cpython/commit/216a4d83c3b72f4fdcd81b588dc3f42cc461739a

Remedy

https://github.com/python/cpython/commit/be5de958e9052e322b0087c6dba81cdad0c3e031

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2019-5010?

    CVE-2019-5010 is a null pointer dereference vulnerability in the certificate parsing code in Python, which can cause a denial of service.

  • How does CVE-2019-5010 affect Python?

    CVE-2019-5010 affects Python versions 2.7.5-86.el7, 3.6.8-15.1.el8, 3.6.9-2.el6, and 3.6.9-2.el7.

  • What is the severity of CVE-2019-5010?

    CVE-2019-5010 has a severity rating of 7, which is considered high.

  • How can the CVE-2019-5010 vulnerability be exploited?

    The CVE-2019-5010 vulnerability can be exploited by parsing specially crafted certificates, which triggers a null pointer dereference and causes a denial of service.

  • Is there a fix for CVE-2019-5010?

    Yes, the vulnerability can be fixed by updating to the appropriate patched version of Python.

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