CVSS: 5.9EPSS: 0%CPEs: 4EXPL: 1CVE-2020-8649 – kernel: invalid read location in vgacon_invert_region function in drivers/video/console/vgacon.c
https://notcve.org/view.php?id=CVE-2020-8649
There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vgacon_invert_region function in drivers/video/console/vgacon.c. Se presenta una vulnerabilidad de uso de la memoria previamente liberada en el kernel de Linux versiones hasta 5.5.2, en la función vgacon_invert_region en el archivo drivers/video/console/vgacon.c. A flaw was found in the Linux kernel’s implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console. An out-of-bounds read can occur, leaking information to the console. • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html https://bugzilla.kernel.org/show_bug.cgi?id=206357 https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html https://www.debian.org/security/2020/dsa-4698 https://access.redhat.com/security/cve/CVE-2020-8649 https://bugzilla.redhat.com/show_bug.cgi?id=1802555 • CWE-416: Use After Free •
CVSS: 7.1EPSS: 0%CPEs: 1EXPL: 0CVE-2020-8428
https://notcve.org/view.php?id=CVE-2020-8428
fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory, aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket, if the socket is being moved to a new parent directory and its old parent directory is being removed. El archivo fs/namei.c en el kernel de Linux versiones anteriores a 5.5, presenta una vulnerabilidad de uso de la memoria previamente liberada en la función may_create_in_sticky, que permite a usuarios locales causar una denegación de servicio (OOPS) u obtener información confidencial de la memoria del kernel, también se conoce como CID-d0cb50185ae9. Un vector de ataque puede ser una llamada de sistema abierta para un socket del dominio UNIX, si el socket está siendo movido hacia un nuevo directorio padre y su antiguo directorio padre está siendo eliminado. • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html http://www.openwall.com/lists/oss-security/2020/01/28/4 http://www.openwall.com/lists/oss-security/2020/02/02/1 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0cb50185ae942b03c4327be322055d622dc79f6 https://github.com/torvalds/linux/commit/d0cb50185ae942b03c4327be322055d622dc79f6 https://lists.debian.org/deb • CWE-416: Use After Free •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2019-20422
https://notcve.org/view.php?id=CVE-2019-20422
In the Linux kernel before 5.3.4, fib6_rule_lookup in net/ipv6/ip6_fib.c mishandles the RT6_LOOKUP_F_DST_NOREF flag in a reference-count decision, leading to (for example) a crash that was identified by syzkaller, aka CID-7b09c2d052db. En el kernel de Linux versiones anteriores a 5.3.4, la función fib6_rule_lookup en el archivo net/ipv6/ip6_fib.c maneja inapropiadamente el flag RT6_LOOKUP_F_DST_NOREF en una decisión de conteo de referencias, lo que conlleva a (por ejemplo) un bloqueo que fue identificado por syzkaller, también se conoce como CID-7b09c2d052db. • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4 https://github.com/torvalds/linux/commit/7b09c2d052db4b4ad0b27b97918b46a7746966fa https://security.netapp.com/advisory/ntap-20200313-0003 • CWE-755: Improper Handling of Exceptional Conditions •
CVSS: 5.3EPSS: 0%CPEs: 19EXPL: 0CVE-2019-18282 – kernel: The flow_dissector feature allows device tracking
https://notcve.org/view.php?id=CVE-2019-18282
The flow_dissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 has a device tracking vulnerability, aka CID-55667441c84f. This occurs because the auto flowlabel of a UDP IPv6 packet relies on a 32-bit hashrnd value as a secret, and because jhash (instead of siphash) is used. The hashrnd value remains the same starting from boot time, and can be inferred by an attacker. This affects net/core/flow_dissector.c and related code. La función flow_dissector en el kernel de Linux 4.3 a 5.x anterior a la versión 5.3.10 tiene una vulnerabilidad de seguimiento del dispositivo, también conocida como CID-55667441c84f. • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.10 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=55667441c84fa5e0911a0aac44fb059c15ba6da2 https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html https://security.netapp.com/advisory/ntap-20200204-0002 https://www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2o https://access.redhat.com/security/cve/CVE-2019-18282 https://bugzilla.redhat.com/show_bug.cgi?id=1796360 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-330: Use of Insufficiently Random Values •
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 •