CVSS: 7.5EPSS: 0%CPEs: 2EXPL: 0CVE-2023-0401 – NULL dereference during PKCS7 data verification
https://notcve.org/view.php?id=CVE-2023-0401
A NULL pointer can be dereferenced when signatures are being verified on PKCS7 signed or signedAndEnveloped data. In case the hash algorithm used for the signature is known to the OpenSSL library but the implementation of the hash algorithm is not available the digest initialization will fail. There is a missing check for the return value from the initialization function which later leads to invalid usage of the digest API most likely leading to a crash. The unavailability of an algorithm can be caused by using FIPS enabled configuration of providers or more commonly by not loading the legacy provider. PKCS7 data is processed by the SMIME library calls and also by the time stamp (TS) library calls. The TLS implementation in OpenSSL does not call these functions however third party applications would be affected if they call these functions to verify signatures on untrusted data. A NULL pointer vulnerability was found in OpenSSL, which can be dereferenced when signatures are being verified on PKCS7 signed or signedAndEnveloped data. • https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=d3b6dfd70db844c4499bec6ad6601623a565e674 https://security.gentoo.org/glsa/202402-08 https://www.openssl.org/news/secadv/20230207.txt https://access.redhat.com/security/cve/CVE-2023-0401 https://bugzilla.redhat.com/show_bug.cgi?id=2164500 • CWE-476: NULL Pointer Dereference •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2023-0217 – NULL dereference validating DSA public key
https://notcve.org/view.php?id=CVE-2023-0217
An invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function. This will most likely lead to an application crash. This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack. The TLS implementation in OpenSSL does not call this function but applications might call the function if there are additional security requirements imposed by standards such as FIPS 140-3. A flaw was found in OpenSSL. An invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function, most likely leading to an application crash. • https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=23985bac83fd50c8e29431009302b5442f985096 https://security.gentoo.org/glsa/202402-08 https://www.openssl.org/news/secadv/20230207.txt https://access.redhat.com/security/cve/CVE-2023-0217 https://bugzilla.redhat.com/show_bug.cgi?id=2164499 • CWE-476: NULL Pointer Dereference •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2022-3996 – X.509 Policy Constraints Double Locking
https://notcve.org/view.php?id=CVE-2022-3996
If an X.509 certificate contains a malformed policy constraint and policy processing is enabled, then a write lock will be taken twice recursively. On some operating systems (most widely: Windows) this results in a denial of service when the affected process hangs. Policy processing being enabled on a publicly facing server is not considered to be a common setup. Policy processing is enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function. Update (31 March 2023): The description of the policy processing enablement was corrected based on CVE-2023-0466. Si un certificado X.509 contiene una restricción de política con formato incorrecto y el procesamiento de políticas está habilitado, se aplicará un bloqueo de escritura dos veces de forma recursiva. En algunos sistemas operativos (más ampliamente: Windows), esto resulta en una Denegación de Servicio (DoS) cuando el proceso afectado se bloquea. • https://github.com/openssl/openssl/commit/7725e7bfe6f2ce8146b6552b44e0d226be7638e7 https://www.openssl.org/news/secadv/20221213.txt • CWE-667: Improper Locking •
CVSS: 7.5EPSS: 11%CPEs: 9EXPL: 4CVE-2022-3602 – X.509 Email Address 4-byte Buffer Overflow
https://notcve.org/view.php?id=CVE-2022-3602
A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution. Many platforms implement stack overflow protections which would mitigate against the risk of remote code execution. • https://github.com/colmmacc/CVE-2022-3602 https://github.com/eatscrayon/CVE-2022-3602-poc https://github.com/corelight/CVE-2022-3602 https://github.com/cybersecurityworks553/CVE-2022-3602-and-CVE-2022-3786 http://packetstormsecurity.com/files/169687/OpenSSL-Security-Advisory-20221101.html http://www.openwall.com/lists/oss-security/2022/11/01/15 http://www.openwall.com/lists/oss-security/2022/11/01/16 http://www.openwall.com/lists/oss-security/2022/11/01/17 http://www&# • CWE-121: Stack-based Buffer Overflow CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 0%CPEs: 6EXPL: 1CVE-2022-3786 – X.509 Email Address Variable Length Buffer Overflow
https://notcve.org/view.php?id=CVE-2022-3786
A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). In a TLS client, this can be triggered by connecting to a malicious server. • https://github.com/cybersecurityworks553/CVE-2022-3602-and-CVE-2022-3786 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=c42165b5706e42f67ef8ef4c351a9a4c5d21639a https://www.openssl.org/news/secadv/20221101.txt https://access.redhat.com/security/cve/CVE-2022-3786 https://bugzilla.redhat.com/show_bug.cgi?id=2139104 https://access.redhat.com/security/vulnerabilities/RHSB-2022-004 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-193: Off-by-one Error •