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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-2021-27645

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-2021-4209

GnuTLS: Null pointer dereference in MD_UPDATE

A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.

CVSS 3.1 · 6.5 Medium EPSS 2.0% KEV · Not listed
Vendors
Gnu Netapp Redhat
Products
Gnutls Active Iq Unified Manager Hci Bootstrap Os and 3 more
CVE-2021-20232

gnutls: Use after free in client_send_params in lib/ext/pre_shared_key.c

A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.

CVSS 3.1 · 9.8 Critical EPSS 3.4% KEV · Not listed
Vendors
Fedoraproject Gnu Redhat
Products
Fedora Gnutls Enterprise Linux
CVE-2021-20193

tar: Memory leak in read_header() in list.c

A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 3.3 Low EPSS 1.1% KEV · Not listed
Vendors
Gnu
Products
Tar
CVE-2021-3999

glibc: Off-by-one buffer overflow/underflow in getcwd()

A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Debian Gnu Netapp and 1 more
Products
Debian Linux Glibc E-series Performance Analyzer and 13 more
CVE-2021-3998

glibc: Unexpected return value from realpath() could leak data based on the application

A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.

CVSS 3.1 · 7.5 High EPSS 2.3% KEV · Not listed
Vendors
Gnu Netapp
Products
Glibc H300s H300s Firmware and 9 more
CVE-2021-3326

glibc: Assertion failure in ISO-2022-JP-3 gconv module related to combining characters

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid input sequences in the ISO-2022-JP-3 encoding, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

CVSS 3.1 · 7.5 High EPSS 3.8% KEV · Not listed
Vendors
Debian Fujitsu Gnu and 3 more
Products
Debian Linux M10-1 M10-1 Firmware and 15 more
CVE-2020-29573

glibc: stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern

sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of "Fixed for glibc 2.33" in the 26649 reference.

CVSS 3.1 · 7.5 High EPSS 2.7% KEV · Not listed
Vendors
Gnu Netapp Redhat
Products
Glibc Cloud Backup Solidfire Baseboard Management Controller and 6 more
CVE-2020-29562

glibc: assertion failure in iconv when converting invalid UCS4

The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

CVSS 3.1 · 4.8 Medium EPSS 1.7% KEV · Not listed
Vendors
Fedoraproject Gnu Netapp
Products
Fedora Glibc E-series Santricity Os Controller
CVE-2020-27618

glibc: iconv when processing invalid multi-byte input sequences fails to advance the input state, which could result in an infinite loop

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid multi-byte input sequences in IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state, which could lead to an infinite loop in applications, resulting in a denial of service, a different vulnerability from CVE-2016-10228.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Gnu Netapp and 2 more
Products
Debian Linux Glibc 500f and 22 more
CVE-2020-24659

gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent

An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.

CVSS 3.1 · 7.5 High EPSS 3.8% KEV · Not listed
Vendors
Canonical Fedoraproject Gnu and 2 more
Products
Ubuntu Linux Fedora Gnutls and 2 more
CVE-2020-13777

gnutls: session resumption works without master key allowing MITM

GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.

CVSS 3.1 · 7.4 High EPSS 22.5% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 2 more
Products
Ubuntu Linux Debian Linux Fedora and 4 more
CVE-2020-6096

glibc: signed comparison vulnerability in the ARMv7 memcpy function

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

CVSS 3.1 · 8.1 High EPSS 5.5% KEV · Not listed
Vendors
Debian Fedoraproject Gnu
Products
Debian Linux Fedora Glibc
CVE-2020-1752

glibc: use-after-free in glob() function when expanding ~user

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Gnu and 2 more
Products
Ubuntu Linux Debian Linux Glibc and 7 more
CVE-2020-1751

glibc: array overflow in backtrace functions for powerpc

An out-of-bounds write vulnerability was found in glibc before 2.31 when handling signal trampolines on PowerPC. Specifically, the backtrace function did not properly check the array bounds when storing the frame address, resulting in a denial of service or potential code execution. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Gnu Redhat
Products
Ubuntu Linux Glibc Enterprise Linux
CVE-2020-11501

gnutls: DTLS client hello contains a random value of all zeroes

GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol.

CVSS 3.1 · 7.4 High EPSS 3.4% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 3 more
Products
Ubuntu Linux Debian Linux Fedora and 3 more
CVE-2020-10029

glibc: stack corruption from crafted input in cosl, sinl, sincosl, and tanl functions

The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 4 more
Products
Ubuntu Linux Debian Linux Fedora and 15 more
CVE-2019-25013

glibc: buffer over-read in iconv when processing invalid multi-byte input sequences in the EUC-KR encoding

The iconv feature in the GNU C Library (aka glibc or libc6) through 2.32, when processing invalid multi-byte input sequences in the EUC-KR encoding, may have a buffer over-read.

CVSS 3.1 · 5.9 Medium EPSS 3.6% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 3 more
Products
Fabric Operating System Debian Linux Fedora and 9 more