CVE-2020-12402

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secr...

ALPINE-CVE-2020-12402

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secr...

CVE-2020-12402

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secr...

CVE-2020-12402

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secr...

UBUNTU-CVE-2020-12402

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secr...

Updated mbedtls packages fix security vulnerabilities

This update from mbedTLS 2.16.2 to mbedTLS 2.16.4 fixes several security vulnerabilities, among which: The deterministic ECDSA calculation reused the scheme's HMAC-DRBG to implement blinding. Because of this for the same key and message the same blinding value was generated. This reduced the...

EulerOS 2.0 SP2 : openssl098e (EulerOS-SA-2019-2509)

According to the versions of the openssl098e package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - The OpenSSL toolkit provides support for secure communications between machines. OpenSSL includes a certificate management tool and shared...

Mbed TLS -- Side channel attack on ECDSA

Janos Follath reports: Our bignum implementation is not constant time/constant trace, so side channel attacks can retrieve the blinded value, factor it as it is smaller than RSA keys and not guaranteed to have only large prime factors, and then, by brute force, recover the key...

bignum-fuzzer/fuzzer_boringssl_mbedtls_num_len_100_all_operations_num_loops_1: Heap-buffer-overflow in mpi_write_hlp

Project: https://github.com/guidovranken/bignum-fuzzer.git Detailed report: https://oss-fuzz.com/testcase?key=5167698789531648 Project: bignum-fuzzer Fuzzer: libFuzzerbignum-fuzzerfuzzerboringsslmbedtlsnumlen100alloperationsnumloops1 Fuzz target binary:...

Weak Cryptographic Protection Mechanisms

OpenSSL has weak cryptographic protection mechanism. The way that the BNsqr function in OpenSSL is implemented is incorrect. It doesn't not calculate the square of a BIGNUM value making it easier for attackers to get past the protection mechanism...

DEBIAN-CVE-2018-16152

In verifyemsapkcs1signature in gmprsapublickey.c in the gmp plugin in strongSwan 4.x and 5.x before 5.7.0, the RSA implementation based on GMP does not reject excess data in the digestAlgorithm.parameters field during PKCS1 v1.5 signature verification. Consequently, a remote attacker can forge...

openssl: Out-of-bounds write caused by unchecked errors in BN_bn2dec()

An out of bounds write flaw was discovered in the OpenSSL BNbn2dec function. An attacker able to make an application using OpenSSL to process a large BIGNUM could cause the application to crash or, possibly, execute arbitrary code...

openssl: Out-of-bounds write caused by unchecked errors in BN_bn2dec()

An out of bounds write flaw was discovered in the OpenSSL BNbn2dec function. An attacker able to make an application using OpenSSL to process a large BIGNUM could cause the application to crash or, possibly, execute arbitrary code...

Security Bulletin: Vulnerabilities in GSKit affect IBM MessageSight (CVE-2015-0159, CVE-2015-0138)

Summary GSKit is an IBM component that is used by IBM MessageSight. The GSKit that is shipped with MessageSight contains multiple security vulnerabilities including the “FREAK: Factoring Attack on RSA-EXPORT keys" TLS/SSL client and server vulnerability. MessageSight has addressed the applicable...

Security Bulletin: IBM Tealeaf Customer Experience is affected by vulnerabilities in OpenSSL

Summary Vulnerabilities in OpenSSL including the “FREAK” attack affect IBM Tealeaf Customer Experience. Vulnerability Details CVEID: CVE-2014-3569 DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by the failure to properly handle attempts to use unsupported protocols by the...

Axessh 4.2 - Denial Of Service

Axessh是一款windows下的ssh工具，使用后会开启ssh 22端口，并开启wsshed.exe服务，当wsshed.exe在接收字符串时，会调用BIGNUM相关函数进行处理，但对于BIGNUM的结构体没有进行赋初值，导致空指针引用引发拒绝服务漏洞，下面对此漏洞进行详细分析。 这里要提的一点是，Exploit-db给的PoC可以触发漏洞，但实际上，只要连接22端口，都会引发这个漏洞的发生，哪怕只发送一字节的内容。 附加wsshed.exe，执行PoC，引发中断，这边捕获到漏洞触发位置。 0:000 g f74.a68: Access violation - code c00000...

OpenSSL: BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption

An integer overflow flaw, leading to a NULL pointer dereference or a heap-based memory corruption, was found in the way some BIGNUM functions of OpenSSL were implemented. Applications that use these functions with large untrusted input could crash or, potentially, execute arbitrary code...

MySQL 5.7.x < 5.7.16 Multiple Vulnerabilities (October 2016 CPU) (SWEET32)

The version of MySQL running on the remote host is 5.7.x prior to 5.7.16. It is, therefore, affected by multiple vulnerabilities : - Multiple integer overflow conditions exist in s3srvr.c, sslsess.c, and t1lib.c due to improper use of pointer arithmetic for heap-buffer boundary checks. An...

Amazon Linux AMI : openssl (ALAS-2016-755)

It was discovered that OpenSSL did not always use constant time operations when computing Digital Signature Algorithm DSA signatures. A local attacker could possibly use this flaw to obtain a private DSA key belonging to another user or service running on the same system. CVE-2016-2178 It was...

openssl: Bignum squaring may produce incorrect results

It was found that OpenSSL's BigNumber Squaring implementation could produce incorrect results under certain special conditions. This flaw could possibly affect certain OpenSSL library functionality, such as RSA blinding. Note that this issue occurred rarely and with a low probability, and there i...