Free and open-source vulnerability scanner
Mageni eases for you the vulnerability scanning, assessment, and management process. It is free and open-source.
Install NowAvailable for macOS, Windows, and Linux
Debian: Security Advisory for linux (DSA-4978-1)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'linux' package(s) announced via the DSA-4978-1 advisory.
Insight
Insight
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2020-3702 A flaw was found in the driver for Atheros IEEE 802.11n family of chipsets (ath9k) allowing information disclosure. CVE-2020-16119 Hadar Manor reported a use-after-free in the DCCP protocol implementation in the Linux kernel. A local attacker can take advantage of this flaw to cause a denial of service or potentially to execute arbitrary code. CVE-2021-3653 Maxim Levitsky discovered a vulnerability in the KVM hypervisor implementation for AMD processors in the Linux kernel: Missing validation of the `int_ctl` VMCB field could allow a malicious L1 guest to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. The L2 guest can take advantage of this flaw to write to a limited but still relatively large subset of the host physical memory. CVE-2021-3656 Maxim Levitsky and Paolo Bonzini discovered a flaw in the KVM hypervisor implementation for AMD processors in the Linux kernel. Missing validation of the `virt_ext` VMCB field could allow a malicious L1 guest to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. Under these circumstances, the L2 guest is able to run VMLOAD/VMSAVE unintercepted and thus read/write portions of the host's physical memory. CVE-2021-3679 A flaw in the Linux kernel tracing module functionality could allow a privileged local user (with CAP_SYS_ADMIN capability) to cause a denial of service (resource starvation). CVE-2021-3732 Alois Wohlschlager reported a flaw in the implementation of the overlayfs subsystem, allowing a local attacker with privileges to mount a filesystem to reveal files hidden in the original mount. CVE-2021-3739 A NULL pointer dereference flaw was found in the btrfs filesystem, allowing a local attacker with CAP_SYS_ADMIN capabilities to cause a denial of service. CVE-2021-3743 An out-of-bounds memory read was discovered in the Qualcomm IPC router protocol implementation, allowing to cause a denial of service or information leak. CVE-2021-3753 Minh Yuan reported a race condition in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c, which may cause an out of bounds read in vt. CVE-2021-37576 Alexey Kardashevskiy reported a buffer overflow in the KVM subsystem on the powerpc platform, which allows KVM guest OS users to cause memory corruption on the host. CVE-2021-38160 A flaw in the virtio_console was discovered allowing data corruption or data loss by an untrusted device. CVE-2021-38166 An integer overflow flaw in the BPF subsystem co ... Description truncated. Please see the references for more information.
Affected Software
Affected Software
'linux' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For the stable distribution (bullseye), these problems have been fixed in version 5.10.46-5. This update includes fixes for #993948 and #993978. We recommend that you upgrade your linux packages.