Vulnerabilities (CVE)

Join the Common Vulnerabilities and Exposures (CVE) community and start to get notified about new vulnerabilities.

Filtered by vendor Stunnel Subscribe
Total 12 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-20230 1 Stunnel 1 Stunnel 2022-06-01 5.0 MEDIUM 7.5 HIGH
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.
CVE-2003-0147 3 Openpkg, Openssl, Stunnel 3 Openpkg, Openssl, Stunnel 2018-10-19 5.0 MEDIUM N/A
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).
CVE-2001-0060 1 Stunnel 1 Stunnel 2018-05-02 10.0 HIGH N/A
Format string vulnerability in stunnel 3.8 and earlier allows attackers to execute arbitrary commands via a malformed ident username.
CVE-2002-0002 4 Engardelinux, Mandrakesoft, Redhat and 1 more 4 Secure Linux, Mandrake Linux, Linux and 1 more 2017-10-09 7.5 HIGH N/A
Format string vulnerability in stunnel before 3.22 when used in client mode for (1) smtp, (2) pop, or (3) nntp allows remote malicious servers to execute arbitrary code.
CVE-2011-2940 1 Stunnel 1 Stunnel 2017-08-28 9.3 HIGH N/A
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.
CVE-2008-2400 1 Stunnel 1 Stunnel 2017-08-07 7.2 HIGH N/A
Unspecified vulnerability in stunnel before 4.23, when running as a service on Windows, allows local users to gain privileges via unknown attack vectors.
CVE-2008-2420 1 Stunnel 1 Stunnel 2017-08-07 6.8 MEDIUM N/A
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.
CVE-2014-0016 1 Stunnel 1 Stunnel 2017-01-26 4.3 MEDIUM N/A
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.
CVE-2015-3644 1 Stunnel 1 Stunnel 2016-12-27 5.8 MEDIUM N/A
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.
CVE-2003-0740 1 Stunnel 1 Stunnel 2016-10-17 4.6 MEDIUM N/A
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.
CVE-2002-1563 1 Stunnel 1 Stunnel 2016-10-17 1.2 LOW N/A
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.
CVE-2013-1762 1 Stunnel 1 Stunnel 2014-01-16 6.6 MEDIUM N/A
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.