CVSS: 5.9EPSS: 0%CPEs: 205EXPL: 0CVE-2021-3449 – NULL pointer deref in signature_algorithms processing
https://notcve.org/view.php?id=CVE-2021-3449
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 clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. • http://www.openwall.com/lists/oss-security/2021/03/27/1 http://www.openwall.com/lists/oss-security/2021/03/27/2 http://www.openwall.com/lists/oss-security/2021/03/28/3 http://www.openwall.com/lists/oss-security/2021/03/28/4 https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf https://cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fb9fa6b51defd48157eeb207f52181f735d96148 https://kb.pulse • CWE-476: NULL Pointer Dereference •
CVSS: 8.2EPSS: 0%CPEs: 49EXPL: 1CVE-2020-24718
https://notcve.org/view.php?id=CVE-2020-24718
bhyve, as used in FreeBSD through 12.1 and illumos (e.g., OmniOS CE through r151034 and OpenIndiana through Hipster 2020.04), does not properly restrict VMCS and VMCB read/write operations, as demonstrated by a root user in a container on an Intel system, who can gain privileges by modifying VMCS_HOST_RIP. bhyve, como es usado en FreeBSD versiones hasta 12.1 e illumos (por ejemplo, OmniOS CE versiones hasta r151034 y OpenIndiana versiones hasta Hipster 2020.04), no restringe apropiadamente las operaciones de lectura y de escritura de VMCS y VMCB, como es demostrado por un usuario root en un contenedor en un sistema Intel, quién puede alcanzar privilegios al modificar VMCS_HOST_RIP • https://github.com/illumos/illumos-gate/blob/84971882a96ac0fecd538b02208054a872ff8af3/usr/src/uts/i86pc/io/vmm/intel/vmcs.c#L246-L249 https://security.FreeBSD.org/advisories/FreeBSD-SA-20:28.bhyve_vmcs.asc https://security.netapp.com/advisory/ntap-20201016-0002 • CWE-862: Missing Authorization •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 2CVE-2020-24863
https://notcve.org/view.php?id=CVE-2020-24863
A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode. Se encontró una vulnerabilidad de corrupción de memoria en la función del kernel kern_getfsstat en MidnightBSD versiones anteriores a 1.2.7 y versiones 1.3 hasta el19-08-2020, y FreeBSD versiones hasta 11.4, que permite a un atacante desencadenar una liberación no válida y bloquear el sistema por medio de un valor de tamaño diseñado en conjunto con un modo no válido • http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc https://www.midnightbsd.org/notes • CWE-787: Out-of-bounds Write •
CVSS: 5.5EPSS: 0%CPEs: 43EXPL: 1CVE-2020-13434 – sqlite: integer overflow in sqlite3_str_vappendf function in printf.c
https://notcve.org/view.php?id=CVE-2020-13434
SQLite through 3.32.0 has an integer overflow in sqlite3_str_vappendf in printf.c. SQLite versiones hasta 3.32.0, presenta un desbordamiento de enteros en la función sqlite3_str_vappendf en el archivo printf.c. An integer overflow flaw was found in the SQLite implementation of the printf() function. This flaw allows an attacker who can control the precision of floating-point conversions, to crash the application, resulting in a denial of service. • http://seclists.org/fulldisclosure/2020/Dec/32 http://seclists.org/fulldisclosure/2020/Nov/19 http://seclists.org/fulldisclosure/2020/Nov/20 http://seclists.org/fulldisclosure/2020/Nov/22 https://lists.debian.org/debian-lts-announce/2020/05/msg00024.html https://lists.debian.org/debian-lts-announce/2020/08/msg00037.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7KXQWHIY2MQP4LNM6ODWJENMXYYQYBN https://security.FreeBSD.org/advisories/FreeBSD-SA-20: • CWE-121: Stack-based Buffer Overflow CWE-190: Integer Overflow or Wraparound •
CVSS: 7.5EPSS: 8%CPEs: 38EXPL: 1CVE-2020-1967 – Segmentation fault in SSL_check_chain
https://notcve.org/view.php?id=CVE-2020-1967
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 versions prior to 1.1.1d. • https://github.com/irsl/CVE-2020-1967 http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00004.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00011.html http://packetstormsecurity.com/files/157527/OpenSSL-signature_algorithms_cert-Denial-Of-Service.html http://seclists.org/fulldisclosure/2020/May/5 http://www.openwall.com/lists/oss-security/2020/04/22/2 https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=eb563247aef3e83dda7679c43f9649270462e5b1 https:/&# • CWE-476: NULL Pointer Dereference •