CVE-2021-3975

libvirt: segmentation fault during VM shutdown can lead to vdsm hang

A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial of service attack by causing the libvirt daemon to crash.

CVSS 3.1 · 6.5 Medium EPSS 1.7% KEV · Not listed

Vendors

Canonical Debian Fedoraproject and 2 more

Products

Ubuntu Linux Debian Linux Fedora and 12 more

CVE-2021-3930

QEMU: off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c

An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Qemu Redhat

Products

Debian Linux Qemu Advanced Virtualization and 8 more

CVE-2021-3744

kernel: crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd()

A memory leak flaw was found in the Linux kernel in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c, which allows attackers to cause a denial of service (memory consumption). This vulnerability is similar with the older CVE-2019-18808.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Fedoraproject Linux and 2 more

Products

Debian Linux Fedora Linux Kernel and 21 more

CVE-2021-3697

grub2: Crafted JPEG image can lead to buffer underflow write in the heap

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

CVSS 3.1 · 7.0 High EPSS < 1% KEV · Not listed

Vendors

Gnu Redhat

Products

Grub2 Codeready Linux Builder Developer Tools and 11 more

CVE-2021-3696

grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling

A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

CVSS 3.1 · 4.5 Medium EPSS < 1% KEV · Not listed

Vendors

Gnu Netapp Redhat

Products

Grub2 Ontap Select Deploy Administration Utility Codeready Linux Builder and 12 more

CVE-2021-3695

grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap

A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.

CVSS 3.1 · 4.5 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Gnu Netapp and 1 more

Products

Fedora Grub2 Ontap Select Deploy Administration Utility and 13 more

CVE-2021-3677

postgresql: memory disclosure in certain queries

A flaw was found in postgresql. A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.

CVSS 3.1 · 6.5 Medium EPSS 1.4% KEV · Not listed

Vendors

Fedoraproject Postgresql Redhat

Products

Fedora Postgresql Enterprise Linux and 6 more

CVE-2021-3672

c-ares: Missing input validation of host names may lead to domain hijacking

A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.

CVSS 3.1 · 5.6 Medium EPSS 2.8% KEV · Not listed

Vendors

C-ares Project Fedoraproject Nodejs and 3 more

Products

C-ares Fedora Node.js and 16 more

CVE-2021-3659

kernel: NULL pointer dereference in llsec_key_alloc() in net/mac802154/llsec.c

A NULL pointer dereference flaw was found in the Linux kernel’s IEEE 802.15.4 wireless networking subsystem in the way the user closes the LR-WPAN connection. This flaw allows a local user to crash the system. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Linux Redhat

Products

Fedora Linux Kernel Codeready Linux Builder and 14 more

CVE-2021-3656

kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)

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 "virt_ext" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) 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.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Linux Redhat

Products

Fedora Linux Kernel 3scale Api Management and 28 more

CVE-2021-3609

kernel: race condition in net/can/bcm.c leads to local privilege escalation

.A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in the CAN subsystem to corrupt memory, crash the system or escalate privileges. This race condition in net/can/bcm.c in the Linux kernel allows for local privilege escalation to root.

CVSS 3.1 · 7.0 High EPSS < 1% KEV · Not listed

Vendors

Linux Netapp Redhat

Products

Linux Kernel H300e H300e Firmware and 43 more

CVE-2021-3602

buildah: Host environment variables leaked in build container when using chroot isolation

An information disclosure flaw was found in Buildah, when building containers using chroot isolation. Running processes in container builds (e.g. Dockerfile RUN commands) can access environment variables from parent and grandparent processes. When run in a container in a CI/CD environment, environment variables may include sensitive information that was shared with the container in order to be used only by Buildah itself (e.g. container registry credentials).

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Buildah Project Redhat

Products

Buildah Enterprise Linux Enterprise Linux For Ibm Z Systems and 1 more

CVE-2021-3551

pki-server: Dogtag installer "pkispawn" logs admin credentials into a world-readable log file

A flaw was found in the PKI-server, where the spkispawn command, when run in debug mode, stores admin credentials in the installation log file. This flaw allows a local attacker to retrieve the file to obtain the admin password and gain admin privileges to the Dogtag CA manager. The highest threat from this vulnerability is to confidentiality.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Dogtagpki Fedoraproject Oracle and 1 more

Products

Dogtagpki Fedora Linux and 9 more

CVE-2021-23214

postgresql: server processes unencrypted bytes from man-in-the-middle

When the server is configured to use trust authentication with a clientcert requirement or to use cert authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first established, despite the use of SSL certificate verification and encryption.

CVSS 3.1 · 8.1 High EPSS 1.9% KEV · Not listed

Vendors

Fedoraproject Postgresql Redhat

Products

Fedora Postgresql Enterprise Linux and 4 more

CVE-2021-23177

libarchive: extracting a symlink with ACLs modifies ACLs of target

An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to change the ACL of a file on the system and gain more privileges.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Debian Fedoraproject Libarchive and 1 more

Products

Debian Linux Fedora Libarchive and 10 more

CVE-2021-20257

QEMU: net: e1000: infinite loop while processing transmit descriptors

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Debian Fedoraproject Qemu and 1 more

Products

Debian Linux Fedora Qemu and 6 more

CVE-2020-9490

httpd: Push diary crash on specifically crafted HTTP/2 header

Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.

CVSS 3.1 · 7.5 High EPSS 88.8% KEV · Not listed

Vendors

Apache Canonical Debian and 4 more

Products

Http Server Ubuntu Linux Debian Linux and 25 more

CVE-2020-8945

proglottis/gpgme: Use-after-free in GPGME bindings during container image pull

The proglottis Go wrapper before 0.1.1 for the GPGME library has a use-after-free, as demonstrated by use for container image pulls by Docker or CRI-O. This leads to a crash or potential code execution during GPG signature verification.

CVSS 3.1 · 7.5 High EPSS 5.1% KEV · Not listed

Vendors

Fedoraproject Gpgme Project Redhat

Products

Fedora Gpgme Enterprise Linux and 9 more

CVE-2020-27842

openjpeg: null pointer dereference in opj_tgt_reset function in lib/openjp2/tgt.c

There's a flaw in openjpeg's t2 encoder in versions prior to 2.4.0. An attacker who is able to provide crafted input to be processed by openjpeg could cause a null pointer dereference. The highest impact of this flaw is to application availability.

CVSS 3.1 · 5.5 Medium EPSS 1.5% KEV · Not listed

Vendors

Debian Fedoraproject Oracle and 2 more

Products

Debian Linux Extra Packages For Enterprise Linux Fedora and 8 more

CVE-2020-25719

samba: Samba AD DC did not always rely on the SID and PAC in Kerberos tickets

A flaw was found in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication. The Samba AD DC, could become confused about the user a ticket represents if it did not strictly require a Kerberos PAC and always use the SIDs found within. The result could include total domain compromise.

CVSS 3.1 · 7.2 High EPSS 1.7% KEV · Not listed

Vendors

Canonical Debian Fedoraproject and 2 more

Products

Ubuntu Linux Debian Linux Fedora and 15 more