CVSS: 9.8EPSS: 2%CPEs: 42EXPL: 0CVE-2021-3711 – SM2 Decryption Buffer Overflow
https://notcve.org/view.php?id=CVE-2021-3711
24 Aug 2021 — In order to decrypt SM2 encrypted data an application is expected to call the API function EVP_PKEY_decrypt(). Typically an application will call this function twice. The first time, on entry, the "out" parameter can be NULL and, on exit, the "outlen" parameter is populated with the buffer size required to hold the decrypted plaintext. The application can then allocate a sufficiently sized buffer and call EVP_PKEY_decrypt() again, but this time passing a non-NULL value for the "out" parameter. A bug in the ... • http://www.openwall.com/lists/oss-security/2021/08/26/2 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •
CVSS: 5.9EPSS: 13%CPEs: 205EXPL: 1CVE-2021-3449 – NULL pointer deref in signature_algorithms processing
https://notcve.org/view.php?id=CVE-2021-3449
25 Mar 2021 — An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS c... • https://github.com/riptl/cve-2021-3449 • CWE-476: NULL Pointer Dereference •
CVSS: 7.4EPSS: 0%CPEs: 56EXPL: 0CVE-2021-3450 – CA certificate check bypass with X509_V_FLAG_X509_STRICT
https://notcve.org/view.php?id=CVE-2021-3450
25 Mar 2021 — The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectivel... • http://www.openwall.com/lists/oss-security/2021/03/27/1 • CWE-295: Improper Certificate Validation •
CVSS: 4.3EPSS: 0%CPEs: 15EXPL: 0CVE-2021-23839 – Incorrect SSLv2 rollback protection
https://notcve.org/view.php?id=CVE-2021-23839
16 Feb 2021 — OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater than SSLv2 are supposed to use a special form of padding. A server that supports greater than SSLv2 is supposed to reject connection attempts from a client where this special form of padding is present, because this i... • https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf • CWE-327: Use of a Broken or Risky Cryptographic Algorithm •
CVSS: 5.9EPSS: 0%CPEs: 38EXPL: 2CVE-2021-23841 – Null pointer deref in X509_issuer_and_serial_hash()
https://notcve.org/view.php?id=CVE-2021-23841
16 Feb 2021 — The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never di... • https://github.com/Trinadh465/external_boringssl_openssl_1.1.0g_CVE-2021-23841 • CWE-476: NULL Pointer Dereference •
CVSS: 7.5EPSS: 0%CPEs: 67EXPL: 1CVE-2021-23840 – Integer overflow in CipherUpdate
https://notcve.org/view.php?id=CVE-2021-23840
16 Feb 2021 — Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrad... • https://github.com/Trinadh465/openssl-1.1.1g_CVE-2021-23840 • CWE-190: Integer Overflow or Wraparound •
CVSS: 5.9EPSS: 0%CPEs: 75EXPL: 1CVE-2020-1971 – EDIPARTYNAME NULL pointer dereference
https://notcve.org/view.php?id=CVE-2020-1971
08 Dec 2020 — The X.509 GeneralName type is a generic type for representing different types of names. One of those name types is known as EDIPartyName. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. A NULL pointer dereference and a crash may occur leading to a possible denial of service attack. • https://github.com/MBHudson/CVE-2020-1971 • CWE-476: NULL Pointer Dereference •
CVSS: 4.3EPSS: 0%CPEs: 40EXPL: 0CVE-2020-1968 – Raccoon attack
https://notcve.org/view.php?id=CVE-2020-1968
09 Sep 2020 — The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ... • https://lists.debian.org/debian-lts-announce/2020/09/msg00016.html • CWE-203: Observable Discrepancy •
CVSS: 7.5EPSS: 60%CPEs: 38EXPL: 2CVE-2020-1967 – Segmentation fault in SSL_check_chain
https://notcve.org/view.php?id=CVE-2020-1967
21 Apr 2020 — Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the "signature_algorithms_cert" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL ver... • https://packetstorm.news/files/id/157527 • CWE-476: NULL Pointer Dereference •
CVSS: 9.1EPSS: 0%CPEs: 7EXPL: 0CVE-2020-7043
https://notcve.org/view.php?id=CVE-2020-7043
27 Feb 2020 — An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL before 1.0.2. tunnel.c mishandles certificate validation because hostname comparisons do not consider '\0' characters, as demonstrated by a good.example.com\x00evil.example.com attack. Se detectó un problema en openfortivpn versión 1.11.0, cuando se usaba con OpenSSL versiones anteriores a 1.0.2. en el archivo tunnel.c maneja inapropiadamente la comprobación del certificado porque las comparaciones hostname no consideran los caracteres "\... • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00009.html • CWE-295: Improper Certificate Validation •