Gnutls
By the Year
In 2023 there have been 2 vulnerabilities in Gnutls with an average score of 6.7 out of ten. Last year Gnutls had 2 security vulnerabilities published. At the current rates, it appears that the number of vulnerabilities last year and this year may equal out. Last year, the average CVE base score was greater by 0.35
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2023 | 2 | 6.65 |
| 2022 | 2 | 7.00 |
| 2021 | 2 | 9.80 |
| 2020 | 3 | 7.43 |
| 2019 | 2 | 7.50 |
| 2018 | 4 | 5.75 |
It may take a day or so for new Gnutls vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.
Recent Gnutls Security Vulnerabilities
A vulnerability was found
CVE-2023-5981
5.9 - Medium
- November 28, 2023
A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.
Side Channel Attack
A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS
CVE-2023-0361
7.4 - High
- February 15, 2023
A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.
Side Channel Attack
A NULL pointer dereference flaw was found in GnuTLS
CVE-2021-4209
6.5 - Medium
- August 24, 2022
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.
NULL Pointer Dereference
A vulnerability found in gnutls
CVE-2022-2509
7.5 - High
- August 01, 2022
A vulnerability found in gnutls. This security flaw happens because of a double free error occurs during verification of pkcs7 signatures in gnutls_pkcs7_verify function.
Double-free
A flaw was found in gnutls
CVE-2021-20232
9.8 - Critical
- March 12, 2021
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.
Dangling pointer
A flaw was found in gnutls
CVE-2021-20231
9.8 - Critical
- March 12, 2021
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.
Dangling pointer
An issue was discovered in GnuTLS before 3.6.15
CVE-2020-24659
7.5 - High
- September 04, 2020
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.
Memory Corruption
GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2
CVE-2020-13777
7.4 - High
- June 04, 2020
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.
Use of a Broken or Risky Cryptographic Algorithm
GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS
CVE-2020-11501
7.4 - High
- April 03, 2020
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.
Use of a Broken or Risky Cryptographic Algorithm
It was discovered in gnutls before version 3.6.7 upstream
CVE-2019-3836
7.5 - High
- April 01, 2019
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.
Access of Uninitialized Pointer
A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7
CVE-2019-3829
7.5 - High
- March 27, 2019
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.
Double-free
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
CVE-2018-16868
5.6 - Medium
- December 03, 2018
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.
Side Channel Attack
A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found
CVE-2018-10846
5.6 - Medium
- August 22, 2018
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.
Covert Timing Channel
It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack
CVE-2018-10845
5.9 - Medium
- August 22, 2018
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.
Covert Timing Channel
It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack
CVE-2018-10844
5.9 - Medium
- August 22, 2018
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.
Covert Timing Channel
The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12
CVE-2016-4456
7.5 - High
- August 08, 2017
The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite and corrupt arbitrary files in the filesystem.
Improper Input Validation
GnuTLS before 2.9.10 does not verify the activation and expiration dates of CA certificates, which allows man-in-the-middle attackers to spoof servers via a certificate issued by a CA certificate
CVE-2014-8155
- August 14, 2015
GnuTLS before 2.9.10 does not verify the activation and expiration dates of CA certificates, which allows man-in-the-middle attackers to spoof servers via a certificate issued by a CA certificate that is (1) not yet valid or (2) no longer valid.
DEPRECATED: Code
The _gnutls_ciphertext2compressed function in lib/gnutls_cipher.c in GnuTLS 2.12.23
CVE-2013-2116
- July 03, 2013
The _gnutls_ciphertext2compressed function in lib/gnutls_cipher.c in GnuTLS 2.12.23 allows remote attackers to cause a denial of service (buffer over-read and crash) via a crafted padding length. NOTE: this might be due to an incorrect fix for CVE-2013-0169.
Improper Input Validation
The _gnutls_x509_oid2mac_algorithm function in lib/gnutls_algorithms.c in GnuTLS before 1.4.2 allows remote attackers to cause a denial of service (crash) via a crafted X.509 certificate
CVE-2006-7239
- May 24, 2010
The _gnutls_x509_oid2mac_algorithm function in lib/gnutls_algorithms.c in GnuTLS before 1.4.2 allows remote attackers to cause a denial of service (crash) via a crafted X.509 certificate that uses a hash algorithm that is not supported by GnuTLS, which triggers a NULL pointer dereference.
Cryptographic Issues
The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, multiple Cisco products, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request
CVE-2009-3555
- November 09, 2009
The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, multiple Cisco products, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request that is processed retroactively by a server in a post-renegotiation context, related to a "plaintext injection" attack, aka the "Project Mogul" issue.
Improper Certificate Validation
The Network Security Services (NSS) library before 3.12.3, as used in Firefox; GnuTLS before 2.6.4 and 2.7.4; OpenSSL 0.9.8 through 0.9.8k; and other products support MD2 with X.509 certificates, which might
CVE-2009-2409
- July 30, 2009
The Network Security Services (NSS) library before 3.12.3, as used in Firefox; GnuTLS before 2.6.4 and 2.7.4; OpenSSL 0.9.8 through 0.9.8k; and other products support MD2 with X.509 certificates, which might allow remote attackers to spoof certificates by using MD2 design flaws to generate a hash collision in less than brute-force time. NOTE: the scope of this issue is currently limited because the amount of computation required is still large.
Cryptographic Issues
