Small subgroup attack in Mozilla NSS

tl;dr While the TLS servers attacks has been pretty much studied and fixed see e.g. https://www.secure-resumption.com/ and https://weakdh.org/ the situation with the TLS clients is was not ideal and can be improved. Here I report a Small subgroup attack for TLS clients that I performed against...

The vulnerability of the Bouncy Castle cryptographic protection tool and the openSUSE operating system allows a hacker to gain access to the secret key.

The vulnerability of the Bouncy Castle cryptographic protection and the openSUSE operating system is related to errors in the code. Exploiting this vulnerability can allow a remote attacker to gain access to the secret key by making changes to the algorithm based on elliptic curves of...

Debian DLA-361-1 : bouncycastle security update

The Bouncy Castle Java library before 1.51 does not validate that a point is within the elliptic curve, which makes it easier for remote attackers to obtain private keys via a series of crafted elliptic curve Diffie Hellman ECDH key exchanges, aka an 'invalid curve attack.' For Debian 6 'Squeeze'...

OpenSSL 1.0.2 < 1.0.2e Multiple Vulnerabilities

The version of OpenSSL installed on the remote host is prior to 1.0.2e. It is, therefore, affected by multiple vulnerabilities as referenced in the 1.0.2e advisory. - The ASN1TFLGCOMBINE implementation in crypto/asn1/tasndec.c in OpenSSL before 0.9.8zh, 1.0.0 before 1.0.0t, 1.0.1 before 1.0.1q, a...

CVE-2015-3193

The Montgomery squaring implementation in crypto/bn/asm/x8664-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x8664 platform, as used by the BNmodexp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key...

DEBIAN-CVE-2015-3193

The Montgomery squaring implementation in crypto/bn/asm/x8664-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x8664 platform, as used by the BNmodexp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key...

CVE-2015-3193

The Montgomery squaring implementation in crypto/bn/asm/x8664-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x8664 platform, as used by the BNmodexp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key...

Design/Logic Flaw

The ssl3getkeyexchange function in ssl/s3clnt.c in OpenSSL 1.0.2 before 1.0.2e allows remote servers to cause a denial of service segmentation fault via a zero p value in an anonymous Diffie-Hellman DH ServerKeyExchange message...

CVE-2015-1794

The ssl3getkeyexchange function in ssl/s3clnt.c in OpenSSL 1.0.2 before 1.0.2e allows remote servers to cause a denial of service segmentation fault via a zero p value in an anonymous Diffie-Hellman DH ServerKeyExchange message...

CVE-2015-1794

The ssl3getkeyexchange function in ssl/s3clnt.c in OpenSSL 1.0.2 before 1.0.2e allows remote servers to cause a denial of service segmentation fault via a zero p value in an anonymous Diffie-Hellman DH ServerKeyExchange message...

DEBIAN-CVE-2015-1794

The ssl3getkeyexchange function in ssl/s3clnt.c in OpenSSL 1.0.2 before 1.0.2e allows remote servers to cause a denial of service segmentation fault via a zero p value in an anonymous Diffie-Hellman DH ServerKeyExchange message...

Code injection

The Montgomery squaring implementation in crypto/bn/asm/x8664-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x8664 platform, as used by the BNmodexp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key...

OpenSSL ServerKeyExchange Message Handling Remote Denial of Service Vulnerability

OpenSSL is an open source implementation of SSL for strong encryption of network communications. A security vulnerability exists in OpenSSL, where a remote attacker submitting a special anonymous DH encryption suite of ServerKeyExchange messages can crash the target service if the p-value is set ...

UBUNTU-CVE-2015-1794

The ssl3getkeyexchange function in ssl/s3clnt.c in OpenSSL 1.0.2 before 1.0.2e allows remote servers to cause a denial of service segmentation fault via a zero p value in an anonymous Diffie-Hellman DH ServerKeyExchange message...

UBUNTU-CVE-2015-3193

The Montgomery squaring implementation in crypto/bn/asm/x8664-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x8664 platform, as used by the BNmodexp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key...

CVE-2015-3193

The Montgomery squaring implementation in crypto/bn/asm/x8664-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x8664 platform, as used by the BNmodexp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key...

ssl-dh-params NSE Script

Weak ephemeral Diffie-Hellman parameter detection for SSL/TLS services. This script simulates SSL/TLS handshakes using ciphersuites that have ephemeral Diffie-Hellman as the key exchange algorithm. Diffie-Hellman MODP group parameters are extracted and analyzed for vulnerability to Logjam CVE...

libreswan Denial of Service Vulnerability (CNVD-2015-07581)

libreswan is a VPN based on IPSEC and IKE security protocol implementation of free open source software . A denial of service vulnerability exists in libreswan versions prior to 3.15 and Openswan versions prior to 2.6.45. Allows remote attackers to cause a denial of service via a DH g ^ x zero...

Bouncy Castle Java library Information Disclosure Vulnerability

Legion of the Bouncy Castle Java library is an open source lightweight password package for the Java platform from the Australian company Legion of the Bouncy Castle. An information disclosure vulnerability exists in versions of the Legion of the Bouncy Castle Java library prior to 1.51, which...

CVE-2015-7940

The Bouncy Castle Java library before 1.51 does not validate a point is withing the elliptic curve, which makes it easier for remote attackers to obtain private keys via a series of crafted elliptic curve Diffie Hellman ECDH key exchanges, aka an "invalid curve attack."...