#ssl

In Zend Framework 2, the `Zend\Math\Rand` component generates random bytes using the OpenSSL or Mcrypt extensions when available but will otherwise use PHP's `mt_rand()` function as a fallback. All outputs from `mt_rand()` are predictable for the same PHP process if an attacker can brute force the seed used by the Marsenne-Twister algorithm in a Seed Recovery Attack. This attack can be successfully applied with minimum effort if the attacker has access to either a random number from `mt_rand()` or a Session ID generated without using additional entropy. This makes `mt_rand()` unsuitable for generating non-trivial random bytes since it has Insufficient Entropy to protect against brute force attacks on the seed. The `Zend\Validate\Csrf` component generates CSRF tokens by SHA1 hashing a salt, random number possibly generated using `mt_rand()` and a form name. Where the salt is known, an attacker can brute force the SHA1 hash with minimum effort to discover the random number when `mt_rand...

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer and Transport Layer Security protocols with full-strength cryptography world-wide.

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer and Transport Layer Security protocols with full-strength cryptography world-wide.

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer and Transport Layer Security protocols with full-strength cryptography world-wide.

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer and Transport Layer Security protocols with full-strength cryptography world-wide.

When receiving a message from a client that sent an invalid RSA premaster secret, an issue in s2n-tls results in the server performing additional processing when the premaster secret contains an incorrect client hello version. While no practical attack on s2n-tls has been demonstrated, this causes a small timing difference which could theoretically be used as described in the Marvin Attack [1]. We would like to thank Hubert Kario [2] for reporting this issue. ### Impact The extent of this issue is a timing difference. No practical attack on s2n-tls has been demonstrated. This issue affects server applications that permit RSA key exchange. Applications that use the default, built-in blinding feature or properly implement self-service blinding are not affected. Impacted versions: <= v1.4.15. ### Patches The patch is included in v1.4.16 [3]. ### Workarounds Applications can work around this issue by using an s2n-tls security policy that disallows RSA key exchange. If you have ...

View CSAF 1. EXECUTIVE SUMMARY CVSS v4 5.6 ATTENTION: Low attack complexity Vendor: Emerson Equipment: PACSystem, Fanuc Vulnerabilities: Cleartext Transmission of Sensitive Information, Insufficient Verification of Data Authenticity Insufficiently Protected Credentials, Download of Code Without Integrity Check CISA is aware of a public report, known as "OT:ICEFALL", detailing vulnerabilities found in multiple operational technology (OT) vendors. CISA is issuing this advisory to provide notice of the reported vulnerabilities and identify baseline mitigations for reducing risks to these and other cybersecurity attacks. 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow remote code execution, loss of sensitive information, or a denial-of-service condition. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following Emerson products are affected: PAC Machine Edition: All versions (CVE-2022-30263, CVE-2022-30265) PACSystem RXi: All versions (CVE-2022-30263, CVE-202...

View CSAF 1. EXECUTIVE SUMMARY CVSS v4 5.1 ATTENTION: Exploitable remotely/low attack complexity Vendor: Mitsubishi Electric Equipment: CC-Link IE TSN Industrial Managed Switch Vulnerability: Allocation of Resources Without Limits or Throttling 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to cause a temporary denial-of service (DoS) condition in the web service on the product. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of CC-Link IE TSN Industrial Managed Switch are affected: NZ2MHG-TSNT8F2: Versions 05 and prior NZ2MHG-TSNT4: Versions 05 and prior 3.2 Vulnerability Overview 3.2.1 Allocation of Resources Without Limits or Throttling CWE-770 Mitsubishi Electric CC-Link IE TSN Industrial Managed Switch has an OpenSSL vulnerability that allows an attacker to cause a temporary denial-of service (DoS) condition on the web service of the product by getting a legitimate administrator user to import specially crafted certificat...

### Summary BoringSSLAEADContext keeps track of how many OHTTP responses have been sent and uses this sequence number to calculate the appropriate nonce to use with the encryption algorithm. Unfortunately, two separate errors combine which would allow an attacker to cause the sequence number to overflow and thus the nonce to repeat. ### Details 1. There is no overflow detection or enforcement of the maximum sequence value. (This is a missed requirement from the draft Chunked Oblivious OHTTP RFC and so should be inherited from the HPKE RFC 9180, Section 5.2). 2. The sequence number (seq) is stored as 32-bit int which is relatively easy to overflow. https://github.com/netty/netty-incubator-codec-ohttp/blob/1ddadb6473cd3be5491d114431ed4c1a9f316001/codec-ohttp-hpke-classes-boringssl/src/main/java/io/netty/incubator/codec/hpke/boringssl/BoringSSLAEADContext.java#L112-L114 ### Impact If the BoringSSLAEADContext is used to encrypt more than 2^32 messages then the AES-GCM nonce will repeat...

In my first article, Part I: Like a Rainbow In The Dark, I described which problems distributed tracing can help you solve. I also provided some strategies for adopting this observability superpower without getting overwhelmed. As you continue down that path, though, there are some myths that need to be busted, and complex concepts demystified.Let's start with a common phrase that sounds good at first but ultimately isn't useful. This statement can both come from the engineering trenches or whoever is calling the shots: “I want great observability without touching a line of code”.That’s