Gnu Gnutls vulnerabilities

CVE-2021-20232 [CRITICAL] CWE-416 CVE-2021-20232: A flaw was found in gnutls. A use after free issue 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.

CVE-2021-20231 [CRITICAL] CWE-416 CVE-2021-20231: A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.

CVE-2020-24659 [HIGH] CWE-476 CVE-2020-24659: An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in 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 f

CVE-2020-13777 [HIGH] CWE-327 CVE-2020-13777: GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of co 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 encryp

CVE-2020-11501 [HIGH] CWE-330 CVE-2020-11501: GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3. 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.

CVE-2015-0294 [HIGH] CWE-295 CVE-2015-0294: GnuTLS before 3.3.13 does not validate that the signature algorithms match when importing a certific GnuTLS before 3.3.13 does not validate that the signature algorithms match when importing a certificate.

CVE-2015-8313 [MEDIUM] CWE-203 CVE-2015-8313: GnuTLS incorrectly validates the first byte of padding in CBC modes GnuTLS incorrectly validates the first byte of padding in CBC modes

CVE-2019-3836 [HIGH] CWE-456 CVE-2019-3836: It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer acc It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer access in gnutls versions 3.6.3 or later which can be triggered by certain post-handshake messages.

CVE-2019-3829 [HIGH] CWE-416 CVE-2019-3829: A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7. A memory corruption (double fr A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7. A memory corruption (double free) vulnerability in the certificate verification API. Any client or server application that verifies X.509 certificates with GnuTLS 3.5.8 or later is affected.

CVE-2018-16868 [MEDIUM] CWE-203 CVE-2018-16868: A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles v A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

CVE-2018-10846 [MEDIUM] CWE-385 CVE-2018-10846: A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM at A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets.

CVE-2018-10844 [MEDIUM] CWE-385 CVE-2018-10844: It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets.

CVE-2018-10845 [MEDIUM] CWE-385 CVE-2018-10845: It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.

CVE-2016-4456 [HIGH] CWE-20 CVE-2016-4456: The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite a The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite and corrupt arbitrary files in the filesystem.

CVE-2017-7507 [HIGH] CWE-476 CVE-2017-7507: GnuTLS version 3.5.12 and earlier is vulnerable to a NULL pointer dereference while decoding a statu GnuTLS version 3.5.12 and earlier is vulnerable to a NULL pointer dereference while decoding a status response TLS extension with valid contents. This could lead to a crash of the GnuTLS server application.

CVE-2017-7869 [HIGH] CWE-787 CVE-2017-7869: GnuTLS before 2017-02-20 has an out-of-bounds write caused by an integer overflow and heap-based buf GnuTLS before 2017-02-20 has an out-of-bounds write caused by an integer overflow and heap-based buffer overflow related to the cdk_pkt_read function in opencdk/read-packet.c. This issue (which is a subset of the vendor's GNUTLS-SA-2017-3 report) is fixed in 3.5.10.

CVE-2017-5336 [CRITICAL] CWE-119 CVE-2017-5336: Stack-based buffer overflow in the cdk_pk_get_keyid function in lib/opencdk/pubkey.c in GnuTLS befor Stack-based buffer overflow in the cdk_pk_get_keyid function in lib/opencdk/pubkey.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attackers to have unspecified impact via a crafted OpenPGP certificate.

CVE-2017-5337 [CRITICAL] CWE-119 CVE-2017-5337: Multiple heap-based buffer overflows in the read_attribute function in GnuTLS before 3.3.26 and 3.5. Multiple heap-based buffer overflows in the read_attribute function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to have unspecified impact via a crafted OpenPGP certificate.

CVE-2017-5334 [CRITICAL] CWE-415 CVE-2017-5334: Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26 and 3 Double free vulnerability in the gnutls_x509_ext_import_proxy function in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allows remote attackers to have unspecified impact via crafted policy language information in an X.509 certificate with a Proxy Certificate Information extension.

CVE-2017-5335 [HIGH] CWE-125 CVE-2017-5335: The stream reading functions in lib/opencdk/read-packet.c in GnuTLS before 3.3.26 and 3.5.x before 3 The stream reading functions in lib/opencdk/read-packet.c in GnuTLS before 3.3.26 and 3.5.x before 3.5.8 allow remote attackers to cause a denial of service (out-of-memory error and crash) via a crafted OpenPGP certificate.