CVE-2019-5010

mediumpriority · attend · 47EPSS 0.207 · 98 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

20.7% (98th) EPSS

CVSS 5 · medium

Is it mine?

87 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.05.9mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.05.9mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · talos-cna@cisco.com USexploitability 2.2 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · NCSC-NL NL

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-476USprimaryCWE-476USCWE-476US

exploits (1)

Public proof-of-concept and weaponised exploit code.

JonathanWilbur/CVE-2019-5010CVE-2019-5010 Exploit PoC - Python Denial of Service via Malformed X.509v3 ExtensionPoC · poc_in_github

affected products (87)

Products and version ranges known to be affected.

Avaya Aura Communication Managerall versionscert_bundDEcpe:/a:avaya:communication_manager:-
Avaya Aura Session Managerall versionscert_bundDEcpe:/a:avaya:session_manager:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Open Source Pythonall versionscert_bundDEcpe:/a:python:python:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
n/a Python≤ Python.org CPython 2.7.11 Python.org CPython 3.6.6 Python.org CPython 3.5.2 Python.org CPython 3 master at 480833808e918a1dcebbbcfd07d5a8de3c5c2a66enisa_euvdEU
Novell Inc. OpenSUSE Leap≤ 42.3fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.0fstec_bduRU
Novell Inc. OpenStack Cloud Magnum Orchestration≤ 7.0fstec_bduRU
Novell Inc. SUSE CaaS Platform≤ 3.0fstec_bduRU
Novell Inc. SUSE Enterprise Storage≤ 4fstec_bduRU
Novell Inc. SUSE Enterprise Storage≤ 5fstec_bduRU
Novell Inc. SUSE Linux Enterprise≤ Server for SAP Applications 12 SP1fstec_bduRU
Novell Inc. SUSE Linux Enterprise≤ Server for SAP Applications 12 SP1-LTSSfstec_bduRU
Novell Inc. SUSE Linux Enterprise≤ Server 12 SP2-ESPOSfstec_bduRU
Novell Inc. SUSE Linux Enterprise≤ Server 12 SP2-BCLfstec_bduRU
Novell Inc. SUSE Linux Enterprise≤ Server for SAP Applications 12 SP2-ESPOSfstec_bduRU

showing 20 of 87

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2025-0041Kwetsbaarheden verholpen in F5 BIG-IPNL2025-02-07csaf · ncsc_nlNL
F5 heeft kwetsbaarheden verholpen in BIG-IP.
WID-SEC-W-2024-1601Python: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2019-01-31csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Python ausnutzen, um einen Denial of Service Angriff durchzuführen.
PSF-2019-8TALOS-2018-0758 SSL CRL distribution points Denial of Service2019-10-31vendor · osvUS
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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl osv NVD CVE.org MITRE

published 2019-10-31modified 2026-10-07

related (8,785)

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+8780 more

references (47)

External citations — patches, advisories, analysis.

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