CVSS: 8.8EPSS: 0%CPEs: 15EXPL: 1CVE-2021-3653 – kernel: SVM nested virtualization issue in KVM (AVIC support)
https://notcve.org/view.php?id=CVE-2021-3653
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7. • http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html https://bugzilla.redhat.com/show_bug.cgi?id=1983686 https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html https://www.openwall.com/lists/oss-security/2021/08/16/1 https://access.redhat.com/security/cve/CVE-2021-3653 • CWE-862: Missing Authorization •
CVSS: 7.8EPSS: 0%CPEs: 10EXPL: 0CVE-2021-33285 – ntfs-3g: Out-of-bounds heap buffer access in ntfs_get_attribute_value() due to incorrect check of bytes_in_use value in MFT records
https://notcve.org/view.php?id=CVE-2021-33285
In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute is supplied to the function ntfs_get_attribute_value, a heap buffer overflow can occur allowing for memory disclosure or denial of service. The vulnerability is caused by an out-of-bound buffer access which can be triggered by mounting a crafted ntfs partition. The root cause is a missing consistency check after reading an MFT record : the "bytes_in_use" field should be less than the "bytes_allocated" field. When it is not, the parsing of the records proceeds into the wild. En NTFS-3G versiones anteriores a 2021.8.22, cuando es suministrado un atributo NTFS especialmente diseñado a la función ntfs_get_attribute_value, puede ocurrir un desbordamiento del búfer de la pila, permitiendo una divulgación de memoria o una denegación de servicio. • http://www.openwall.com/lists/oss-security/2021/08/30/1 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386 https://bugzilla.redhat.com/show_bug.cgi?id=2001608 https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp https://lists.debian.org/debian-lts-announce/2021/11/msg00013.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3 https://lists.fedoraproject.org/archives/list/package-announce%40lists&# • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-787: Out-of-bounds Write •
CVSS: 7.8EPSS: 0%CPEs: 9EXPL: 0CVE-2021-39251 – ntfs-3g: NULL pointer dereference in ntfs_extent_inode_open()
https://notcve.org/view.php?id=CVE-2021-39251
A crafted NTFS image can cause a NULL pointer dereference in ntfs_extent_inode_open in NTFS-3G < 2021.8.22. Una imagen NTFS diseñada puede causar una desreferencia de puntero NULL en la función ntfs_extent_inode_open en NTFS-3G versiones anteriores a 2021.8.22 The ntfs3g package is susceptible to an input validation attack. When processing a crafted NTFS image there is an improper check. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. • http://www.openwall.com/lists/oss-security/2021/08/30/1 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386 https://bugzilla.redhat.com/show_bug.cgi?id=2001649 https://github.com/tuxera/ntfs-3g/releases https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp https://lists.debian.org/debian-lts-announce/2021/11/msg00013.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3 https://lists.f • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-476: NULL Pointer Dereference •
CVSS: 4.3EPSS: 0%CPEs: 8EXPL: 1CVE-2021-3622 – hivex: stack overflow due to recursive call of _get_children()
https://notcve.org/view.php?id=CVE-2021-3622
A flaw was found in the hivex library. This flaw allows an attacker to input a specially crafted Windows Registry (hive) file, which would cause hivex to recursively call the _get_children() function, leading to a stack overflow. The highest threat from this vulnerability is to system availability. Se ha encontrado un fallo en hivex library. Este fallo permite a un atacante introducir un archivo del Registro de Windows (hive) especialmente diseñado, lo que causaría que hivex llamara recursivamente a la función _get_children(), conllevando a un desbordamiento de pila. • https://bugzilla.redhat.com/show_bug.cgi?id=1975489 https://github.com/libguestfs/hivex/commit/771728218dac2fbf6997a7e53225e75a4c6b7255 https://listman.redhat.com/archives/libguestfs/2021-August/msg00002.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S35TVTAPHORSUIFYNFBHKLQRPVFUPXBE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/USD4OEV6L3RPHE32V2MJ4JPFBODINWSU https://access.redhat.com/security/cve/CVE-2021-3622 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 8.1EPSS: 1%CPEs: 7EXPL: 1CVE-2021-40153 – squashfs-tools: unvalidated filepaths allow writing outside of destination
https://notcve.org/view.php?id=CVE-2021-40153
squashfs_opendir in unsquash-1.c in Squashfs-Tools 4.5 stores the filename in the directory entry; this is then used by unsquashfs to create the new file during the unsquash. The filename is not validated for traversal outside of the destination directory, and thus allows writing to locations outside of the destination. La función squashfs_opendir en el archivo unsquash-1.c en Squashfs-Tools versión 4.5, almacena el nombre del archivo en la entrada del directorio; esto es entonces usado por unsquashfs para crear el nuevo archivo durante el desensamblaje. El nombre de archivo no se comprueba para saltar fuera del directorio de destino, y por lo tanto permite escribir en lugares fuera del destino. A flaw was found in Squashfs-tools, where it is vulnerable to attacks similar to zip-slip. • https://bugs.launchpad.net/ubuntu/+source/squashfs-tools/+bug/1941790 https://github.com/plougher/squashfs-tools/commit/79b5a555058eef4e1e7ff220c344d39f8cd09646 https://github.com/plougher/squashfs-tools/issues/72 https://lists.debian.org/debian-lts-announce/2021/08/msg00030.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSMRKVJMJFX3MB7D3PXJSYY3TLZROE5S https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RAOZ4BKWAC4Y3U2K5MMW3S77HWWXHQDL https:&# • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •