CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2019-19338 – Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135)
https://notcve.org/view.php?id=CVE-2019-19338
A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability. • https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338 https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort https://www.openwall.com/lists/oss-security/2019/12/10/3 https://access.redhat.com/security/cve/CVE-2019-19338 https://bugzilla.redhat.com/show_bug.cgi?id=1781514 • CWE-203: Observable Discrepancy CWE-385: Covert Timing Channel •
CVSS: 7.8EPSS: 0%CPEs: 35EXPL: 1CVE-2019-19448
https://notcve.org/view.php?id=CVE-2019-19448
In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure. En el kernel de Linux versiones 5.0.21 y 5.3.11, montando una imagen de sistema de archivos btrfs diseñada, al realizar algunas operaciones y luego haciendo una llamada de sistema syncfs puede conllevar a un uso de la memoria previamente liberada en la función try_merge_free_space en el archivo fs/btrfs/free-space-cache.c porque el puntero en una estructura de datos izquierda puede ser el mismo que el puntero en una estructura de datos derecha. • https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448 https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html https://security.netapp.com/advisory/ntap-20200103-0001 https://usn.ubuntu.com/4578-1 • CWE-416: Use After Free •
CVSS: 7.8EPSS: 0%CPEs: 8EXPL: 1CVE-2019-19377
https://notcve.org/view.php?id=CVE-2019-19377
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can lead to a use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c. En el kernel de Linux versión 5.0.21, montar una imagen de sistema de archivos btrfs diseñada, realizar algunas operaciones y desmontarlas puede conllevar a un uso de la memoria previamente liberada en la función btrfs_queue_work en el archivo fs/btrfs/async-thread.c. • https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19377 https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html https://security.netapp.com/advisory/ntap-20200103-0001 https://usn.ubuntu.com/4367-1 https://usn.ubuntu.com/4369-1 https://usn.ubuntu.com/4414-1 • CWE-416: Use After Free •
CVSS: 7.8EPSS: 0%CPEs: 4EXPL: 0CVE-2019-19070
https://notcve.org/view.php?id=CVE-2019-19070
A memory leak in the spi_gpio_probe() function in drivers/spi/spi-gpio.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering devm_add_action_or_reset() failures, aka CID-d3b0ffa1d75d. NOTE: third parties dispute the relevance of this because the system must have already been out of memory before the probe began ** EN DISPUTA ** Una pérdida de memoria en la función spi_gpio_probe() en el archivo drivers/spi/spi-gpio.c en el kernel de Linux versiones hasta la versión 5.3.11, permite a atacantes causar una denegación de servicio (consumo de memoria) al desencadenar fallos de la función devm_add_action_or_reset(), también se conoce como CID-d3b0ffa1d75d. NOTA: Las partes cuestionan la relevancia de esto porque el sistema ya debe haberse quedado sin memoria antes de que comenzara la sonda. • https://bugzilla.suse.com/show_bug.cgi?id=1157294 https://github.com/torvalds/linux/commit/d3b0ffa1d75d5305ebe34735598993afbb8a869d https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3PSDE6PTOTVBK2YTKB2TFQP2SUBVSNF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PY7LJMSPAGRIKABJPDKQDTXYW3L5RX2T • CWE-401: Missing Release of Memory after Effective Lifetime •
CVSS: 7.8EPSS: 1%CPEs: 26EXPL: 0CVE-2019-19050
https://notcve.org/view.php?id=CVE-2019-19050
A memory leak in the crypto_reportstat() function in crypto/crypto_user_stat.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering crypto_reportstat_alg() failures, aka CID-c03b04dcdba1. Una pérdida de memoria en la función crypto_reportstat() en el archivo crypto/crypto_user_stat.c en el kernel de Linux versiones hasta 5.3.11, permite a atacantes causar una denegación de servicio (consumo de memoria) al desencadenar fallos de la función crypto_reportstat_alg(), también se conoce como CID-c03b04dcdba1. • http://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html https://github.com/torvalds/linux/commit/c03b04dcdba1da39903e23cc4d072abf8f68f2dd https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3PSDE6PTOTVBK2YTKB2TFQP2SUBVSNF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PY7LJMSPAGRIKABJPDKQDTXYW3L5RX2T https://security.netapp.com/advisory/ntap-20191205-0001 https://usn.ubuntu.com/4258-1 https://usn.ubuntu.com/4284 • CWE-401: Missing Release of Memory after Effective Lifetime •