CVE-2013-4314
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…
Does this matter?
Lower severity and a low EPSS score (1.20%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N
- EPSS
- 1.20% probability · 66th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- jean-paul calderone/pyopenssl · canonical/ubuntu linux
- Source
- secalert@redhat.com
References
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
- 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-1965-1Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1005325
- https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00015.html
- 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-1965-1Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1005325
- https://mail.python.org/pipermail/pyopenssl-users/2013-September/000478.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.