CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2022-23034
https://notcve.org/view.php?id=CVE-2022-23034
A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check. • http://www.openwall.com/lists/oss-security/2022/01/25/3 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3 https://security.gentoo.org/glsa/202208-23 https://www.debian.org/security/2022/dsa-5117 https://xenbits.xenproject.org/xsa/advisory-394.txt • CWE-191: Integer Underflow (Wrap or Wraparound) •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2022-23033
https://notcve.org/view.php?id=CVE-2022-23033
arm: guest_physmap_remove_page not removing the p2m mappings The functions to remove one or more entries from a guest p2m pagetable on Arm (p2m_remove_mapping, guest_physmap_remove_page, and p2m_set_entry with mfn set to INVALID_MFN) do not actually clear the pagetable entry if the entry doesn't have the valid bit set. It is possible to have a valid pagetable entry without the valid bit set when a guest operating system uses set/way cache maintenance instructions. For instance, a guest issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, might be able to retain access to those pages even after Xen started reusing them for other purposes. arm: la función guest_physmap_remove_page no elimina los mapeos p2m Las funciones para eliminar una o más entradas de una tabla de páginas p2m de huésped en Arm (p2m_remove_mapping, guest_physmap_remove_page y p2m_set_entry con mfn establecido como INVALID_MFN) no borran realmente la entrada de la tabla de páginas si la entrada no presenta el bit válido establecido. Es posible tener una entrada válida en la tabla de páginas sin el bit válido establecido cuando un sistema operativo huésped usa instrucciones de mantenimiento de caché set/way. Por ejemplo, un huésped que emite una instrucción de mantenimiento de caché set/way, y luego llama a la hiperllamada XENMEM_decrease_reservation para devolver páginas de memoria a Xen, podría ser capaz de retener el acceso a esas páginas incluso después de que Xen empezara a reusarlas para otros propósitos • http://www.openwall.com/lists/oss-security/2022/01/25/2 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3 https://security.gentoo.org/glsa/202208-23 https://www.debian.org/security/2022/dsa-5117 https://xenbits.xenproject.org/xsa/advisory-393.txt • CWE-404: Improper Resource Shutdown or Release •
CVSS: 7.8EPSS: 0%CPEs: 9EXPL: 1CVE-2021-45342
https://notcve.org/view.php?id=CVE-2021-45342
A buffer overflow vulnerability in CDataList of the jwwlib component of LibreCAD 2.2.0-rc3 and older allows an attacker to achieve Remote Code Execution using a crafted JWW document. Una vulnerabilidad de desbordamiento de búfer en CDataList del componente jwwlib de LibreCAD versiones 2.2.0-rc3 y anteriores, permite a un atacante lograr una Ejecución de Código Remota usando un documento JWW diseñado • https://github.com/LibreCAD/LibreCAD/issues/1464 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCC2FZ6HZOIK3775K4MTCOUHX6PLGPEL https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUMH3CWGVSMR2UIZEA35Q5UB7PDVVVYS https://security.gentoo.org/glsa/202305-26 https://www.debian.org/security/2022/dsa-5077 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVSS: 9.3EPSS: 0%CPEs: 8EXPL: 1CVE-2021-45341
https://notcve.org/view.php?id=CVE-2021-45341
A buffer overflow vulnerability in CDataMoji of the jwwlib component of LibreCAD 2.2.0-rc3 and older allows an attacker to achieve Remote Code Execution using a crafted JWW document. Una vulnerabilidad de desbordamiento de búfer en CDataMoji del componente jwwlib de LibreCAD versiones 2.2.0-rc3 y anteriores, permite a un atacante lograr la Ejecución de Código Remota usando un documento JWW diseñado • https://github.com/LibreCAD/LibreCAD/issues/1462 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCC2FZ6HZOIK3775K4MTCOUHX6PLGPEL https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUMH3CWGVSMR2UIZEA35Q5UB7PDVVVYS https://security.gentoo.org/glsa/202305-26 https://www.debian.org/security/2022/dsa-5077 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVSS: 5.5EPSS: 0%CPEs: 5EXPL: 1CVE-2021-45343
https://notcve.org/view.php?id=CVE-2021-45343
In LibreCAD 2.2.0, a NULL pointer dereference in the HATCH handling of libdxfrw allows an attacker to crash the application using a crafted DXF document. En LibreCAD versión 2.2.0, una desreferencia de puntero NULL en el manejo de HATCH de libdxfrw permite a un atacante bloquear la aplicación usando un documento DXF diseñado • https://github.com/LibreCAD/LibreCAD/issues/1468 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCC2FZ6HZOIK3775K4MTCOUHX6PLGPEL https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUMH3CWGVSMR2UIZEA35Q5UB7PDVVVYS https://security.gentoo.org/glsa/202305-26 https://www.debian.org/security/2022/dsa-5077 • CWE-476: NULL Pointer Dereference •