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CVE-2021-37750

krb5: NULL pointer dereference in process_tgs_req() in kdc/do_tgs_req.c via a FAST inner body that lacks server field

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.

CVSS 3.1 · 6.5 Medium EPSS 2.5% KEV · Not listed
Vendors
Debian Fedoraproject Mit and 3 more
Products
Debian Linux Fedora Kerberos 5 and 3 more
CVE-2021-36222

krb5: Sending a request containing PA-ENCRYPTED-CHALLENGE padata element without using FAST could result in NULL dereference in KDC which leads to DoS

ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.

CVSS 3.1 · 7.5 High EPSS 10.5% KEV · Not listed
Vendors
Debian Mit Netapp and 2 more
Products
Debian Linux Kerberos 5 Active Iq Unified Manager and 5 more
CVE-2021-35942

glibc: Arbitrary read in wordexp()

The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.

CVSS 3.1 · 9.1 Critical EPSS 2.8% KEV · Not listed
Vendors
Debian Gnu Netapp and 1 more
Products
Debian Linux Glibc Active Iq Unified Manager and 5 more
CVE-2021-33910

systemd: uncontrolled allocation on the stack in function unit_name_path_escape leads to crash

basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

CVSS 3.1 · 5.5 Medium EPSS 8.8% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 2 more
Products
Debian Linux Fedora Hci Management Node and 5 more
CVE-2021-33574

glibc: mq_notify does not handle separately allocated thread attributes

The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

CVSS 3.1 · 9.8 Critical EPSS 3.5% KEV · Not listed
Vendors
Debian Fedoraproject Gnu and 2 more
Products
Debian Linux Fedora Glibc and 18 more
CVE-2021-33560

libgcrypt: mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm

Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.

CVSS 3.1 · 7.5 High EPSS 2.4% KEV · Not listed
Vendors
Debian Fedoraproject Gnupg and 2 more
Products
Debian Linux Fedora Libgcrypt and 6 more
CVE-2021-28153

glib: g_file_replace() with G_FILE_CREATE_REPLACE_DESTINATION creates empty target for dangling symlink

An issue was discovered in GNOME GLib before 2.66.8. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION to replace a path that is a dangling symlink, it incorrectly also creates the target of the symlink as an empty file, which could conceivably have security relevance if the symlink is attacker-controlled. (If the path is a symlink to a file that already exists, then the contents of that file correctly remain unchanged.)

CVSS 3.1 · 5.3 Medium EPSS 2.7% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 2 more
Products
Brocade Fabric Operating System Firmware Debian Linux Fedora and 2 more
CVE-2021-27645

glibc: Use-after-free in addgetnetgrentX function in netgroupcache.c

The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.

CVSS 3.1 · 2.5 Low EPSS < 1% KEV · Not listed
Vendors
Debian Fedoraproject Gnu and 1 more
Products
Debian Linux Fedora Glibc and 1 more
CVE-2021-27219

glib: integer overflow in g_bytes_new function on 64-bit platforms due to an implicit cast from 64 bits to 32 bits

An issue was discovered in GNOME GLib before 2.66.6 and 2.67.x before 2.67.3. The function g_bytes_new has an integer overflow on 64-bit platforms due to an implicit cast from 64 bits to 32 bits. The overflow could potentially lead to memory corruption.

CVSS 3.1 · 7.5 High EPSS 3.1% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 3 more
Products
Brocade Fabric Operating System Firmware Debian Linux Fedora and 12 more
CVE-2021-27218

glib: integer overflow in g_byte_array_new_take function when called with a buffer of 4GB or more on a 64-bit platform

An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. If g_byte_array_new_take() was called with a buffer of 4GB or more on a 64-bit platform, the length would be truncated modulo 2**32, causing unintended length truncation.

CVSS 3.1 · 7.5 High EPSS 4.1% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 3 more
Products
Brocade Fabric Operating System Firmware Debian Linux Fedora and 5 more
CVE-2021-27212

openldap: Assertion failure in slapd in the issuerAndThisUpdateCheck function

In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet, resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime.

CVSS 3.1 · 7.5 High EPSS 66.1% KEV · Not listed
Vendors
Debian Openldap
Products
Debian Linux Openldap
CVE-2021-23336

Web Cache Poisoning

The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.

CVSS 3.1 · 5.9 Medium EPSS 41.1% KEV · Not listed
Vendors
Debian Djangoproject Fedoraproject and 4 more
Products
Debian Linux Django Fedora and 11 more
CVE-2021-22947

curl: Server responses received before STARTTLS processed after TLS handshake

When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker's injected data comes from the TLS-protected server.

CVSS 3.1 · 5.9 Medium EPSS 3.0% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 6 more
Products
Macos Debian Linux Fedora and 34 more
CVE-2021-22946

curl: Requirement to use TLS not properly enforced for IMAP, POP3, and FTP protocols

A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.

CVSS 3.1 · 7.5 High EPSS 4.5% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 6 more
Products
Macos Debian Linux Fedora and 37 more
CVE-2021-22945

curl: use-after-free and double-free in MQTT sending

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.

CVSS 3.1 · 9.1 Critical EPSS 6.7% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 5 more
Products
Macos Debian Linux Fedora and 22 more
CVE-2021-4037

Kernel: security regression for cve-2018-13405

A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group. This can lead to excessive permissions granted in case when they should not. This vulnerability is similar to the previous CVE-2018-13405 and adds the missed fix for the XFS.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Linux Redhat
Products
Debian Linux Linux Kernel Enterprise Linux and 1 more
CVE-2021-22924

curl: Bad connection reuse due to flawed path name checks

libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches the setup.Due to errors in the logic, the config matching function did not take 'issuercert' into account and it compared the involved paths *case insensitively*,which could lead to libcurl reusing wrong connections.File paths are, or can be, case sensitive on many systems but not all, and caneven vary depending on used file systems.The comparison also didn't include the 'issuer cert' which a transfer can setto qualify how to verify the server certificate.

CVSS 3.1 · 3.7 Low EPSS 6.3% KEV · Not listed
Vendors
Debian Fedoraproject Haxx and 5 more
Products
Debian Linux Fedora Libcurl and 52 more
CVE-2021-22898

curl: TELNET stack contents disclosure

curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.

CVSS 3.1 · 3.1 Low EPSS 4.5% KEV · Not listed
Vendors
Debian Fedoraproject Haxx and 4 more
Products
Debian Linux Fedora Curl and 10 more