The vulnerability of the `send_client_hello` function in `handshake.c` of the GnuTLS cryptographic library is related to deficiencies in the cryptographic algorithms used. This vulnerability allows an attacker to gain unauthorized access to confidential data or compromise the integrity of the data.

The vulnerability of the sendclienthello function in the handshake.c file of the GnuTLS cryptographic library is related to deficiencies in the cryptographic algorithms used. Exploiting this vulnerability could allow an attacker to gain unauthorized access to confidential data or compromise the...

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

A cryptographic weakness was found in the way DLTS implementation of GnuTLS, used zeros in place of random numbers. This flaw can break the security guarantee of the DTLS protocol...

Buffer overflow

wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker sends a crafted hello client packet over the network to a TLSv1.3 wolfSSL server. The length fields of the packet: record length, client hello length,...

Out-of-Bounds

Overview Affected versions of this package are vulnerable to Out-of-Bounds wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker sends a crafted hello client packet over the network to a TLSv1.3 wolfSSL...

ALPINE-CVE-2018-12384

When handling a SSLv2-compatible ClientHello request, the server doesn't generate a new random value but sends an all-zero value instead. This results in full malleability of the ClientHello for SSLv2 used for TLS 1.2 in all versions prior to NSS 3.39. This does not impact TLS 1.3...

CVE-2019-6596

In BIG-IP 14.0.0-14.0.0.2, 13.0.0-13.1.1.1, 12.1.0-12.1.3.6, 11.6.1-11.6.3.2, or 11.5.1-11.5.8, when processing fragmented ClientHello messages in a DTLS session TMM may corrupt memory eventually leading to a crash. Only systems offering DTLS connections via APM are impacted...

USN-3850-1 nss vulnerabilities

Keegan Ryan discovered that NSS incorrectly handled ECDSA key generation. A local attacker could possibly use this issue to perform a cache-timing attack and recover private ECDSA keys. CVE-2018-0495 It was discovered that NSS incorrectly handled certain v2-compatible ClientHello messages. A remo...

The vulnerability of the CAPWAP operating system in FortiOS, allowing a hacker to induce a service failure

The vulnerability of the CAPWAP operating system in FortiOS arises from errors in processing input data. Exploiting this vulnerability allows a malicious actor to trigger a service failure by sending a large number of ClientHello DTLS messages...

PT-2018-3641 · Openssl +11 · Openssl +11

Name of the Vulnerable Software and Affected Versions: OpenSSL versions 1.1.1 through 1.1.1j MySQL Server versions 5.7.33 and earlier, 8.0.23 and earlier Description: The issue is related to a NULL pointer dereference in OpenSSL TLS servers when a maliciously crafted renegotiation ClientHello...

gnutls: Crash upon receiving well-formed status_request extension

A null pointer dereference flaw was found in the way GnuTLS processed ClientHello messages with statusrequest extension. A remote attacker could use this flaw to cause an application compiled with GnuTLS to crash...

GnuTLS status_request Extension Null Pointer Dereference (CVE-2017-7507)

A denial of service vulnerability exists in the GnuTLS library. The vulnerability is due to improper parsing of certain values in the statusrequest extension. A remote attacker can exploit this vulnerability by sending a crafted Client Hello to the target server...

CVE-2017-5872

The TCP/IP networking module in Unisys ClearPath MCP systems with TCP-IP-SW 57.1 before 57.152, 58.1 before 58.142, or 59.1 before 59.172, when running a TLS 1.2 service, allows remote attackers to cause a denial of service network connectivity disruption via a client hello with a...

Once due to bug fixes to trigger the vulnerability—CVE-2016-6309 vulnerability detailed analysis-vulnerability warning-the black bar safety net

openssl released a security level for”serious”UAF vulnerability, the exploit is simple, only need to send a tcp packet will trigger the vulnerability, but the consequences are serious, may result in TLS-related applications denial of service or even arbitrary code execution and other consequences...

The vulnerability of the OpenSSL library, which allows a hacker to break the cryptographic security mechanism

The vulnerability of the ssl/s2srvr.c function in the OpenSSL library is related to errors in cryptographic transformations. Exploiting this vulnerability allows a malicious actor to break the cryptographic security mechanism by performing calculations related to SSLv2 traffic, involving function...

WolfSSL Denial of Service Vulnerability

WolfSSL formerly known as CyaSSL is the United States WolfSSL company for embedded systems developers to use a small, portable embedded SSL programming library. A security vulnerability exists in WolfSSL versions prior to 3.6.8. A remote attacker can exploit this vulnerability to cause a denial o...

The vulnerability of the OpenSSL library, which allows attackers to carry out attacks aimed at reducing the security of encryption algorithms

The vulnerability of the OpenSSL library is related to errors in cryptographic transformations. Exploiting this vulnerability allows a malicious actor, operating remotely and having access to the data transmission channel, to carry out attacks aimed at reducing the resilience of encryption...

DEBIAN-CVE-2015-4000

The TLS protocol 1.2 and earlier, when a DHEEXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHEEXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHEEXPORT and then...

CVE-2015-4000

The TLS protocol 1.2 and earlier, when a DHEEXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHEEXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHEEXPORT and then...

TLS protocol man-in-the-middle attack vulnerability

TLS Transport Layer Security is a set of protocols used to provide confidentiality and data integrity between two communicating applications. A security vulnerability exists in the TLS protocol version 1.2 and earlier. When the server enabled the DHEEXPORT cipher suite, the program failed to...

OpenSSL ClientHello signature_algorithms Extension Denial of Service (CVE-2015-0291)

A denial of service vulnerability exists in OpenSSL. The vulnerability is due to a null pointer dereference when an OpenSSL server application, during renegotiation, receives and processes an invalid signaturealgorithms extension in a Client Hello handshake message. A remote, unauthenticated...