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CVSS: 6.5EPSS: 1%CPEs: 30EXPL: 1

The smtplib library in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 does not return an error when StartTLS fails, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack." La librería smtplib en CPython (también conocido como Python) en versiones anteriores a 2.7.12, 3.x en versiones anteriores a 3.4.5 y 3.5.x en versiones anteriores a 3.5.2 no devuelve un error cuando StartTLS falla, lo que podría permitir a atacantes man-in-the-middle eludir las protecciones TLS mediante el aprovechamiento de una posición de red entre el cliente y el registro para bloquear el comando StartTLS, también conocido como un "ataque de decapado StartTLS". It was found that Python's smtplib library did not return an exception when StartTLS failed to be established in the SMTP.starttls() function. A man in the middle attacker could strip out the STARTTLS command without generating an exception on the Python SMTP client application, preventing the establishment of the TLS layer. • https://www.exploit-db.com/exploits/43500 http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html http://rhn.redhat.com/errata/RHSA-2016-1626.html http://rhn.redhat.com/errata/RHSA-2016-1627.html http://rhn.redhat.com/errata/RHSA-2016-1628.html http://rhn.redhat.com/errata/RHSA-2016-1629.html http://rhn.redhat.com/errata/RHSA-2016-1630.html http://www.openwall.com/lists/oss-security/2016/06/14/9 http://www.securityfocus.com/bid/91225 http:& • CWE-693: Protection Mechanism Failure •

CVSS: 6.1EPSS: 0%CPEs: 27EXPL: 2

CRLF injection vulnerability in the HTTPConnection.putheader function in urllib2 and urllib in CPython (aka Python) before 2.7.10 and 3.x before 3.4.4 allows remote attackers to inject arbitrary HTTP headers via CRLF sequences in a URL. Vulnerabilidad de inyección CRLF en la función HTTPConnection.putheader en urllib2 y urllib en CPython (también conocido como Python) en versiones anteriores a 2.7.10 y 3.x en versiones anteriores a 3.4.4 permite a atacantes remotos inyectar cabeceras HTTP arbitrarias a través de secuencias CRLF en una URL. It was found that the Python's httplib library (used by urllib, urllib2 and others) did not properly check HTTPConnection.putheader() function arguments. An attacker could use this flaw to inject additional headers in a Python application that allowed user provided header names or values. • https://github.com/bunseokbot/CVE-2016-5699-poc http://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html http://rhn.redhat.com/errata/RHSA-2016-1626.html http://rhn.redhat.com/errata/RHSA-2016-1627.html http://rhn.redhat.com/errata/RHSA-2016-1628.html http://rhn.redhat.com/errata/RHSA-2016-1629.html http://rhn.redhat.com/errata/RHSA-2016-1630.html http://www.openwall.com • CWE-20: Improper Input Validation CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') •

CVSS: 5.9EPSS: 0%CPEs: 26EXPL: 0

The ssl.match_hostname function in CPython (aka Python) before 2.7.9 and 3.x before 3.3.3 does not properly handle wildcards in hostnames, which might allow man-in-the-middle attackers to spoof servers via a crafted certificate. La función ssl.match_hostname en CPython (también concida como Python) en versiones anteriores a 2.7.9 y 3.x en versiones anteriores a 3.3.3 no maneja correctamente comodines en los nombres de host, lo que podría permitir a atacantes man-in-the-middle suplantar servidores a través de un certificado manipulado. Multiple flaws were found in the way Python's SSL module performed matching of certificate names containing wildcards. A remote attacker able to obtain a valid certificate that contained certain names with wildcards could have them incorrectly accepted by Python SSL clients, not following the RFC 6125 recommendations. • http://seclists.org/oss-sec/2015/q2/483 http://seclists.org/oss-sec/2015/q2/523 http://www.securityfocus.com/bid/74707 https://access.redhat.com/errata/RHSA-2016:1166 https://bugs.python.org/issue17997 https://bugzilla.redhat.com/show_bug.cgi?id=1224999 https://hg.python.org/cpython/rev/10d0edadbcdd https://access.redhat.com/security/cve/CVE-2013-7440 • CWE-19: Data Processing Errors •

CVSS: 7.2EPSS: 0%CPEs: 2EXPL: 0

Untrusted search path vulnerability in python.exe in Python through 3.5.0 on Windows allows local users to gain privileges via a Trojan horse readline.pyd file in the current working directory. NOTE: the vendor says "It was determined that this is a longtime behavior of Python that cannot really be altered at this point." Vulnerabilidad de busqueda de ruta no confiable en python.exe en Python hasta la versión 3.5.0 en Windows, permite a usuarios locales obtener privilegios a través de un Troyano en el archivo readline.pyd en el directorio de trabajo actual. NOTA: el vendedor afirma 'Está determinado que es un comportamiento antiguo de Python que en realidad no puede ser alterado en estos momentos'. • http://jvn.jp/en/jp/JVN49503705/995204/index.html http://jvn.jp/en/jp/JVN49503705/index.html http://jvndb.jvn.jp/jvndb/JVNDB-2015-000141 http://www.securityfocus.com/bid/76929 https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05324755 •

CVSS: 5.8EPSS: 0%CPEs: 88EXPL: 2

The HTTP clients in the (1) httplib, (2) urllib, (3) urllib2, and (4) xmlrpclib libraries in CPython (aka Python) 2.x before 2.7.9 and 3.x before 3.4.3, when accessing an HTTPS URL, do not (a) check the certificate against a trust store or verify that the server hostname matches a domain name in the subject's (b) Common Name or (c) subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate. Los clientes HTTP en las librarias (1) httplib, (2) urllib, (3) urllib2, and (4) xmlrpclib en CPython (también conocido como Python) 2.x anterior a 2.7.9 y 3.x anterior a 3.4.3, cuando accede a una URL HTTPS, not (a) comprueba el certificado contra un almacen trust o verifica que elnombre del servidor coincide con un nombre de dominio en el campo del tema (b) Common Name o (c) subjectAltName del certificado X.509, lo que permite a atacantes man-in-the-middle falsificar servidores SSL a través de un certificado válido arbitrario. The Python standard library HTTP client modules (such as httplib or urllib) did not perform verification of TLS/SSL certificates when connecting to HTTPS servers. A man-in-the-middle attacker could use this flaw to hijack connections and eavesdrop or modify transferred data. • http://bugs.python.org/issue22417 http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html http://www.openwall.com/lists/oss-security/2014/12/11/1 http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html http://www.securityfocus.com/bid/71639 https://access.redhat.com/errata/RHSA-2016:1166 https://access.redhat.com/errata/RHSA-2017:1162 https://access.redhat.com/errata&#x • CWE-345: Insufficient Verification of Data Authenticity •