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CVE-2021-43527

nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS)

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS, S/MIME, PKCS \#7, or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.

CVSS 3.1 · 9.8 Critical EPSS 17.6% KEV · Not listed
Vendors
Mozilla Netapp Oracle and 2 more
Products
Nss Nss Esr Cloud Backup and 14 more
CVE-2021-42377

busybox: an attacker-controlled pointer free in hush applet leads to denial of service and possible code execution when processing a crafted shell command

An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.

CVSS 3.1 · 9.8 Critical EPSS 3.6% KEV · Not listed
Vendors
Busybox Fedoraproject Netapp
Products
Busybox Fedora Cloud Backup and 16 more
CVE-2021-42376

busybox: NULL pointer dereference in hush applet leads to denial of service when processing a crafted shell command

A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Busybox Fedoraproject Netapp
Products
Busybox Fedora Cloud Backup and 16 more
CVE-2021-42373

busybox: NULL pointer dereference in man applet leads to denial of service when a section name is supplied but no page argument is given

A NULL pointer dereference in Busybox's man applet leads to denial of service when a section name is supplied but no page argument is given

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Busybox Fedoraproject Netapp
Products
Busybox Fedora Cloud Backup and 16 more
CVE-2021-42252

kernel: memory overwrite in the kernel with potential privileges execution

An issue was discovered in aspeed_lpc_ctrl_mmap in drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6. Local attackers able to access the Aspeed LPC control interface could overwrite memory in the kernel and potentially execute privileges, aka CID-b49a0e69a7b1. This occurs because a certain comparison uses values that are not memory sizes.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Linux Netapp
Products
Linux Kernel Cloud Backup H300e and 17 more
CVE-2021-41864

kernel: eBPF multiplication integer overflow in prealloc_elems_and_freelist() in kernel/bpf/stackmap.c leads to out-of-bounds write

prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 2 more
Products
Debian Linux Fedora Linux Kernel and 22 more
CVE-2021-41524

null pointer dereference in h2 fuzzing

While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.

CVSS 3.1 · 7.5 High EPSS 25.8% KEV · Not listed
Vendors
Apache Fedoraproject Netapp and 2 more
Products
Http Server Fedora Cloud Backup and 2 more
CVE-2021-41073

kernel: local user privilege escalation via loop_rw_iter in fs/io_uring.c

loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.

CVSS 3.1 · 7.8 High EPSS 1.8% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 1 more
Products
Debian Linux Fedora Linux Kernel and 18 more
CVE-2021-3634

libssh: possible heap-based buffer overflow when rekeying

A flaw has been found in libssh in versions prior to 0.9.6. The SSH protocol keeps track of two shared secrets during the lifetime of the session. One of them is called secret_hash and the other session_id. Initially, both of them are the same, but after key re-exchange, previous session_id is kept and used as an input to new secret_hash. Historically, both of these buffers had shared length variable, which worked as long as these buffers were same. But the key re-exchange operation can also change the key exchange method, which can be based on hash of different size, eventually creating "secret_hash" of different size than the session_id has. This becomes an issue when the session_id memory is zeroed or when it is used again during second key re-exchange.

CVSS 3.1 · 6.5 Medium EPSS 4.7% KEV · Not listed
Vendors
Debian Fedoraproject Libssh and 3 more
Products
Debian Linux Fedora Libssh and 4 more
CVE-2021-3612

kernel: joydev: zero size passed to joydev_handle_JSIOCSBTNMAP()

An out-of-bounds memory write flaw was found in the Linux kernel's joystick devices subsystem in versions before 5.9-rc1, in the way the user calls ioctl JSIOCSBTNMAP. This flaw allows a local user to crash the system or possibly escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 3 more
Products
Debian Linux Fedora Linux Kernel and 23 more
CVE-2021-3506

kernel: Out of bounds memory access bug in get_next_net_page() in fs/f2fs/node.c

An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Debian Linux Netapp
Products
Debian Linux Linux Kernel Cloud Backup and 17 more
CVE-2021-3501

kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run

A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Fedoraproject Linux Netapp and 1 more
Products
Fedora Linux Kernel Cloud Backup and 25 more
CVE-2021-3483

kernel: use-after-free in nosy driver in nosy_ioctl() in drivers/firewire/nosy.c when a device is added twice

A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions before kernel 5.12-rc6 are affected

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Debian Linux Netapp
Products
Debian Linux Linux Kernel Cloud Backup and 16 more
CVE-2021-38300

kernel: crafting anomalous machine code may lead to arbitrary Kernel code execution

arch/mips/net/bpf_jit.c in the Linux kernel before 5.4.10 can generate undesirable machine code when transforming unprivileged cBPF programs, allowing execution of arbitrary code within the kernel context. This occurs because conditional branches can exceed the 128 KB limit of the MIPS architecture.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Debian Linux Netapp
Products
Debian Linux Linux Kernel Cloud Backup and 16 more
CVE-2021-33200

kernel: out-of-bounds reads and writes due to enforcing incorrect limits for pointer arithmetic operations by BPF verifier

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Fedoraproject Linux Netapp and 1 more
Products
Fedora Linux Kernel Cloud Backup and 17 more
CVE-2021-32785

Format string bug in the Redis cache implementation

mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. When mod_auth_openidc versions prior to 2.4.9 are configured to use an unencrypted Redis cache (`OIDCCacheEncrypt off`, `OIDCSessionType server-cache`, `OIDCCacheType redis`), `mod_auth_openidc` wrongly performed argument interpolation before passing Redis requests to `hiredis`, which would perform it again and lead to an uncontrolled format string bug. Initial assessment shows that this bug does not appear to allow gaining arbitrary code execution, but can reliably provoke a denial of service by repeatedly crashing the Apache workers. This bug has been corrected in version 2.4.9 by performing argument interpolation only once, using the `hiredis` API. As a workaround, this vulnerability can be mitigated by setting `OIDCCacheEncrypt` to `on`, as cache keys are cryptographically hashed before use when this option is enabled.

CVSS 3.1 · 5.3 Medium EPSS 2.7% KEV · Not listed
Vendors
Apache Debian Netapp and 1 more
Products
Http Server Debian Linux Cloud Backup and 1 more
CVE-2021-31440

kernel: local escalation of privileges in handling of eBPF programs

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-13661.

CVSS 3.1 · 7.0 High EPSS 1.8% KEV · Not listed
Vendors
Linux Netapp Redhat
Products
Linux Kernel Cloud Backup H300e and 16 more
CVE-2021-29489

Options structure open to XSS if passed unfiltered

Highcharts JS is a JavaScript charting library based on SVG. In Highcharts versions 8 and earlier, the chart options structure was not systematically filtered for XSS vectors. The potential impact was that content from untrusted sources could execute code in the end user's browser. The vulnerability is patched in version 9. As a workaround, implementers who are not able to upgrade may apply DOMPurify recursively to the options structure to filter out malicious markup.

CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed
Vendors
Highcharts Netapp
Products
Highcharts Cloud Backup Oncommand Insight and 2 more