CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2021-20230 – stunnel: client certificate not correctly verified when redirect and verifyChain options are used
https://notcve.org/view.php?id=CVE-2021-20230
22 Feb 2021 — A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality. Se encontró un fallo en stunnel versiones a... • https://bugzilla.redhat.com/show_bug.cgi?id=1925226 • CWE-295: Improper Certificate Validation •
CVSS: 10.0EPSS: 0%CPEs: 14EXPL: 0CVE-2015-3644 – Debian Security Advisory 3299-1
https://notcve.org/view.php?id=CVE-2015-3644
14 May 2015 — Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass authentication. Stunnel 5.00 hasta 5.13, cuando utiliza la opción de redirección, no redirige las conexiones de clientes al servidor esperado después de la conexión inicial, lo que permite a atacantes remotos evadir la autenticación. Johan Olofsson discovered an authentication bypass vulnerability in Stunnel, a program de... • http://www.debian.org/security/2015/dsa-3299 • CWE-284: Improper Access Control •
CVSS: 7.3EPSS: 0%CPEs: 113EXPL: 0CVE-2014-0016 – Gentoo Linux Security Advisory 201408-14
https://notcve.org/view.php?id=CVE-2014-0016
23 Mar 2014 — stunnel before 5.00, when using fork threading, does not properly update the state of the OpenSSL pseudo-random number generator (PRNG), which causes subsequent children with the same process ID to use the same entropy pool and allows remote attackers to obtain private keys for EC (ECDSA) or DSA certificates. stunnel anterior a 5.00, cuando utilizando hilo de bifurcación, no actualiza debidamente el estado del generador de números psuedoaleatorios OpenSSL (PRNG), lo que causa que hijos posteriores con el mi... • http://www.openwall.com/lists/oss-security/2014/03/05/1 • CWE-332: Insufficient Entropy in PRNG •
CVSS: 9.8EPSS: 2%CPEs: 34EXPL: 0CVE-2013-1762 – Stunnel: buffer overflow vulnerability due to incorrect integer conversion in the NTLM authentication of the CONNECT protocol negotiation
https://notcve.org/view.php?id=CVE-2013-1762
08 Mar 2013 — stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow. stunnel v4.21 a v4.54, cuando el protocolo de negociación CONNECT y la autenticación NTLM están habilitadas, no realiza la conversión de enteros correctamente, lo que permite ejecutar código de su elección a servidores remotos proxy a través de una sol... • http://rhn.redhat.com/errata/RHSA-2013-0714.html • CWE-94: Improper Control of Generation of Code ('Code Injection') •
CVSS: 9.8EPSS: 12%CPEs: 2EXPL: 0CVE-2011-2940
https://notcve.org/view.php?id=CVE-2011-2940
25 Aug 2011 — stunnel 4.40 and 4.41 might allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors. stunnel v4.40 y v4.41 permite a atacantes remotos ejecutar código de su elección o provocar una denegación de servicio (corrupción de memoria dinámica) a través de vectores no especificados • http://secunia.com/advisories/45705 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 7.3EPSS: 0%CPEs: 54EXPL: 0CVE-2008-2420
https://notcve.org/view.php?id=CVE-2008-2420
23 May 2008 — The OCSP functionality in stunnel before 4.24 does not properly search certificate revocation lists (CRL), which allows remote attackers to bypass intended access restrictions by using revoked certificates. Vulnerabilidad en la funcionalidad OCSP en stunnel anteriores a 4.24 no busca de forma adecuada la lista de revocación de certificado (CRL), que permite a atacantes remotos intentar saltarse las restricciones de acceso utilizando certificados revocados. • http://secunia.com/advisories/30335 • CWE-264: Permissions, Privileges, and Access Controls •
CVSS: 7.8EPSS: 0%CPEs: 71EXPL: 0CVE-2008-2400
https://notcve.org/view.php?id=CVE-2008-2400
22 May 2008 — Unspecified vulnerability in stunnel before 4.23, when running as a service on Windows, allows local users to gain privileges via unknown attack vectors. Vulnerabilidad sin especificar en stunnel anterior a 4.23, cuando es ejecutado como un servicio en Windows, permite a usuarios locales obtener privilegios a través de vectores de ataque desconocidos. • http://secunia.com/advisories/30297 • CWE-264: Permissions, Privileges, and Access Controls •
CVSS: 5.5EPSS: 0%CPEs: 23EXPL: 1CVE-2003-0740 – Stunnel 3.24/4.00 - Daemon Hijacking
https://notcve.org/view.php?id=CVE-2003-0740
04 Sep 2003 — Stunnel 4.00, and 3.24 and earlier, leaks a privileged file descriptor returned by listen(), which allows local users to hijack the Stunnel server. • https://www.exploit-db.com/exploits/91 •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2002-1563
https://notcve.org/view.php?id=CVE-2002-1563
26 Apr 2003 — stunnel 4.0.3 and earlier allows attackers to cause a denial of service (crash) via SIGCHLD signal handler race conditions that cause an inconsistency in the child counter. stunnerl 4.04 permite a atacantes causar una denegación de servicio (caída) debida a condiciones de carrera en el manejador de la señal SIGCHLD que causa una inconsistencia en el contador de hijos. • http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000736 •
CVSS: 7.5EPSS: 21%CPEs: 35EXPL: 0CVE-2003-0147
https://notcve.org/view.php?id=CVE-2003-0147
18 Mar 2003 — OpenSSL does not use RSA blinding by default, which allows local and remote attackers to obtain the server's private key by determining factors using timing differences on (1) the number of extra reductions during Montgomery reduction, and (2) the use of different integer multiplication algorithms ("Karatsuba" and normal). • ftp://ftp.sco.com/pub/security/OpenLinux/CSSA-2003-014.0.txt •