CVSS: 9.8EPSS: 0%CPEs: 9EXPL: 0CVE-2021-3520 – lz4: memory corruption due to an integer overflow bug caused by memmove argument
https://notcve.org/view.php?id=CVE-2021-3520
There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well. Se presenta un fallo en lz4. Un atacante que envíe un archivo diseñado hacia una aplicación enlazada con lz4 puede ser capaz de desencadenar un desbordamiento de enteros, conllevando una llamada de la función memmove() con un argumento de tamaño negativo, causando una escritura fuera de límites y/o un bloqueo. • https://bugzilla.redhat.com/show_bug.cgi?id=1954559 https://security.netapp.com/advisory/ntap-20211104-0005 https://www.oracle.com//security-alerts/cpujul2021.html https://www.oracle.com/security-alerts/cpuapr2022.html https://www.oracle.com/security-alerts/cpuoct2021.html https://access.redhat.com/security/cve/CVE-2021-3520 • CWE-190: Integer Overflow or Wraparound CWE-787: Out-of-bounds Write •
CVSS: 8.8EPSS: 0%CPEs: 57EXPL: 1CVE-2021-25217 – A buffer overrun in lease file parsing code can be used to exploit a common vulnerability shared by dhcpd and dhclient
https://notcve.org/view.php?id=CVE-2021-25217
In ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16, ISC DHCP 4.4.0 -> 4.4.2 (Other branches of ISC DHCP (i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series) are beyond their End-of-Life (EOL) and no longer supported by ISC. From inspection it is clear that the defect is also present in releases from those series, but they have not been officially tested for the vulnerability), The outcome of encountering the defect while reading a lease that will trigger it varies, according to: the component being affected (i.e., dhclient or dhcpd) whether the package was built as a 32-bit or 64-bit binary whether the compiler flag -fstack-protection-strong was used when compiling In dhclient, ISC has not successfully reproduced the error on a 64-bit system. However, on a 32-bit system it is possible to cause dhclient to crash when reading an improper lease, which could cause network connectivity problems for an affected system due to the absence of a running DHCP client process. In dhcpd, when run in DHCPv4 or DHCPv6 mode: if the dhcpd server binary was built for a 32-bit architecture AND the -fstack-protection-strong flag was specified to the compiler, dhcpd may exit while parsing a lease file containing an objectionable lease, resulting in lack of service to clients. Additionally, the offending lease and the lease immediately following it in the lease database may be improperly deleted. if the dhcpd server binary was built for a 64-bit architecture OR if the -fstack-protection-strong compiler flag was NOT specified, the crash will not occur, but it is possible for the offending lease and the lease which immediately followed it to be improperly deleted. • http://www.openwall.com/lists/oss-security/2021/05/26/6 https://cert-portal.siemens.com/productcert/pdf/ssa-406691.pdf https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf https://kb.isc.org/docs/cve-2021-25217 https://lists.debian.org/debian-lts-announce/2021/06/msg00002.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5QI4DYC7J4BGHEW3NH4XHMWTHYC36UK4 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/ • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 8.1EPSS: 38%CPEs: 25EXPL: 4CVE-2021-23017 – Nginx 1.20.0 - Denial of Service (DOS)
https://notcve.org/view.php?id=CVE-2021-23017
A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact. Se identificó un problema de seguridad en el solucionador de nginx, que podría permitir a un atacante que pueda falsificar paquetes UDP desde el servidor DNS para causar una sobrescritura de memoria de 1 byte, lo que causaría un bloqueo del proceso de trabajo u otro impacto potencial A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in certain circumstances. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Nginx version 1.20.0 suffers from a denial of service vulnerability. • https://www.exploit-db.com/exploits/50973 https://github.com/M507/CVE-2021-23017-PoC https://github.com/ShivamDey/CVE-2021-23017 https://github.com/lakshit1212/CVE-2021-23017-PoC http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html http://packetstormsecurity.com/files/167720/Nginx-1.20.0-Denial-Of-Service.html https://lists.apache.org/thread.html/r37e6b2165f7c910d8e15fd54f4697857619ad2625f56583802004009%40%3Cnotifications.apisix.apache.org%3E https://lists.apache.org/thread.html/r4d4966221ca399 • CWE-193: Off-by-one Error •
CVSS: 6.5EPSS: 0%CPEs: 2EXPL: 0CVE-2021-3559
https://notcve.org/view.php?id=CVE-2021-3559
A flaw was found in libvirt in the virConnectListAllNodeDevices API in versions before 7.0.0. It only affects hosts with a PCI device and driver that supports mediated devices (e.g., GRID driver). This flaw could be used by an unprivileged client with a read-only connection to crash the libvirt daemon by executing the 'nodedev-list' virsh command. The highest threat from this vulnerability is to system availability. Se encontró un fallo en libvirt en la API virConnectListAllNodeDevices en versiones anteriores a 7.0.0. • https://bugzilla.redhat.com/show_bug.cgi?id=1962306 https://security.netapp.com/advisory/ntap-20210706-0006 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2020-36332 – libwebp: excessive memory allocation when reading a file
https://notcve.org/view.php?id=CVE-2020-36332
A flaw was found in libwebp in versions before 1.0.1. When reading a file libwebp allocates an excessive amount of memory. The highest threat from this vulnerability is to the service availability. Se encontró un fallo en libwebp en versiones anteriores a 1.0.1. Al leer un archivo, libwebp asigna una cantidad excesiva de memoria. • https://bugzilla.redhat.com/show_bug.cgi?id=1956868 https://security.netapp.com/advisory/ntap-20211104-0004 https://www.debian.org/security/2021/dsa-4930 https://access.redhat.com/security/cve/CVE-2020-36332 • CWE-20: Improper Input Validation CWE-400: Uncontrolled Resource Consumption •