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Vulnerability details: VCID-ggxv-8ggt-sqfx
Vulnerability ID VCID-ggxv-8ggt-sqfx
Aliases CVE-2013-4314
GHSA-6748-36qp-fx6r
PYSEC-2013-31
Summary The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-20 Improper Input Validation
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 7.5 http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
cvssv4 8.7 http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
generic_textual HIGH http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
epss 0.0025 https://api.first.org/data/v1/epss?cve=CVE-2013-4314
cvssv3.1 7.5 https://bugzilla.redhat.com/show_bug.cgi?id=1005325
cvssv4 8.7 https://bugzilla.redhat.com/show_bug.cgi?id=1005325
generic_textual HIGH https://bugzilla.redhat.com/show_bug.cgi?id=1005325
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-6748-36qp-fx6r
cvssv3.1 7.5 https://github.com/pyca/pyopenssl
cvssv4 8.7 https://github.com/pyca/pyopenssl
generic_textual HIGH https://github.com/pyca/pyopenssl
cvssv3.1 7.5 https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2
cvssv4 8.7 https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2
generic_textual HIGH https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2
cvssv3.1 7.5 https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml
cvssv4 8.7 https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml
generic_textual HIGH https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml
cvssv3.1 7.5 https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
cvssv4 8.7 https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
generic_textual HIGH https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2013-4314
cvssv4 8.7 https://nvd.nist.gov/vuln/detail/CVE-2013-4314
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2013-4314
cvssv3.1 7.5 http://www.debian.org/security/2013/dsa-2763
cvssv4 8.7 http://www.debian.org/security/2013/dsa-2763
generic_textual HIGH http://www.debian.org/security/2013/dsa-2763
cvssv3.1 7.5 http://www.openwall.com/lists/oss-security/2013/09/06/2
cvssv4 8.7 http://www.openwall.com/lists/oss-security/2013/09/06/2
generic_textual HIGH http://www.openwall.com/lists/oss-security/2013/09/06/2
cvssv3.1 7.5 http://www.ubuntu.com/usn/USN-1965-1
cvssv4 8.7 http://www.ubuntu.com/usn/USN-1965-1
generic_textual HIGH http://www.ubuntu.com/usn/USN-1965-1
Reference id Reference type URL
http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2013-4314.json
https://api.first.org/data/v1/epss?cve=CVE-2013-4314
https://bugzilla.redhat.com/show_bug.cgi?id=1005325
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4314
https://github.com/pyca/pyopenssl
https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2
https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml
https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
https://nvd.nist.gov/vuln/detail/CVE-2013-4314
http://www.debian.org/security/2013/dsa-2763
http://www.openwall.com/lists/oss-security/2013/09/06/2
http://www.ubuntu.com/usn/USN-1965-1
722055 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=722055
GHSA-6748-36qp-fx6r https://github.com/advisories/GHSA-6748-36qp-fx6r
USN-1965-1 https://usn.ubuntu.com/1965-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://bugzilla.redhat.com/show_bug.cgi?id=1005325
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://bugzilla.redhat.com/show_bug.cgi?id=1005325
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/pyca/pyopenssl
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/pyca/pyopenssl
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/pyca/pyopenssl/commit/6bbf44a00b35fb28df1f66aa194b2fe95eab1ab2
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2013-31.yaml
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2013-4314
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2013-4314
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.debian.org/security/2013/dsa-2763
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at http://www.debian.org/security/2013/dsa-2763
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.openwall.com/lists/oss-security/2013/09/06/2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at http://www.openwall.com/lists/oss-security/2013/09/06/2
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at http://www.ubuntu.com/usn/USN-1965-1
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Found at http://www.ubuntu.com/usn/USN-1965-1
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Exploit Prediction Scoring System (EPSS)
Percentile 0.48153
EPSS Score 0.0025
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:40:54.661795+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/pyopenssl/PYSEC-2013-31.yaml 38.0.0