Vulnerabilities > Stunnel
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2021-02-23 | CVE-2021-20230 | Improper Certificate Validation vulnerability in Stunnel 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. | 5.0 |
| 2015-05-14 | CVE-2015-3644 | Improper Access Control vulnerability in Stunnel 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. | 5.8 |
| 2014-03-24 | CVE-2014-0016 | Insufficient Entropy in PRNG vulnerability in Stunnel 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. | 4.3 |
| 2013-03-08 | CVE-2013-1762 | Code Injection vulnerability in Stunnel 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. | 6.6 |
| 2011-08-25 | CVE-2011-2940 | Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in Stunnel 4.40/4.41 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. | 9.3 |
| 2008-05-23 | CVE-2008-2420 | Permissions, Privileges, and Access Controls vulnerability in Stunnel 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. | 6.8 |
| 2008-05-22 | CVE-2008-2400 | Permissions, Privileges, and Access Controls vulnerability in Stunnel Unspecified vulnerability in stunnel before 4.23, when running as a service on Windows, allows local users to gain privileges via unknown attack vectors. | 7.2 |
| 2003-10-20 | CVE-2003-0740 | Unspecified vulnerability in Stunnel 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. | 4.6 |
| 2003-05-12 | CVE-2002-1563 | SIGCHLD Signal Handler vulnerability in Stunnel 4.04 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. | 1.2 |
| 2003-03-31 | CVE-2003-0147 | 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). | 5.0 |