50m-ctf: CTF Writeup - c8889970d9fb722066f31e804e351993

CTF Code: c8889970d9fb722066f31e804e351993 HackerOne $50M CTF Write-Up ============ I came across this tweet announcing the HackerOne CTF for invitations to the HackerOne event in Vegas during DEFCON. I tried searching for a URL for the CTF, but couldn't find anything online, so I assumed that th...

CVE-2019-1543: Use of a Broken or Risky Cryptographic Algorithm

ChaCha20-Poly1305 is an AEAD cipher, and requires a unique nonce input for every encryption operation. RFC 7539 specifies that the nonce value IV should be 96 bits 12 bytes. OpenSSL allows a variable nonce length and front pads the nonce with 0 bytes if it is less than 12 bytes. However it also...

CVE-2019-9483: Use of a Broken or Risky Cryptographic Algorithm

Amazon Ring Doorbell before 3.4.7 mishandles encryption, which allows attackers to obtain audio and video data, or insert spoofed video that does not correspond to the actual person at the door...

ISC BIND Assertion Failure Vulnerability

According to its self-reported version, the instance of ISC BIND 9 running on the remote name server is less than 9.11.5-P4 / 9.11.5-S5 / 9.12.3-P4 / 9.13.7. It is, therefore, affected by an assertion failure vulnerability. - An assertion failure exists in the managed-keys component due to an err...

CVE-2019-7006: Use of a Broken or Risky Cryptographic Algorithm

Avaya one-X Communicator uses weak cryptographic algorithms in the client authentication component that could allow a local attacker to decrypt sensitive information. Affected versions include all 6.2.x versions prior to 6.2 SP13...

Linux: KexAlgorithms

Key exchange is any method in cryptography by which cryptographic keys are exchanged between two parties, allowing use of a cryptographic algorithm. If the sender and receiver wish to exchange encrypted messages, each must be equipped to encrypt messages to be sent and decrypt messages received...

CVE-2018-1946

IBM Security Identity Governance and Intelligence 5.2 through 5.2.4.1 Virtual Appliance supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used as a protection mechanism such as encryption or authentication, but it does not select the...

CVE-2018-1946

IBM Security Identity Governance and Intelligence 5.2 through 5.2.4.1 Virtual Appliance supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used as a protection mechanism such as encryption or authentication, but it does not select the...

CVE-2018-1946

IBM Security Identity Governance and Intelligence 5.2 through 5.2.4.1 Virtual Appliance supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used as a protection mechanism such as encryption or authentication, but it does not select the...

CVE-2018-1946

CVE-2018-1946 involves IBM Security Identity Governance and Intelligence (IGI) Virtual Appliance versions 5.2 through 5.2.4.1. The issue is not a bug in code execution but a design/crypto negotiation flaw: multiple actors can negotiate which protection algorithms (e.g., encryption/authentication)...

UBUNTU-CVE-2018-5745

"managed-keys" is a feature which allows a BIND resolver to automatically maintain the keys used by trust anchors which operators configure for use in DNSSEC validation. Due to an error in the managed-keys feature it is possible for a BIND server which uses managed-keys to exit due to an assertio...

CVE-2018-1946: Inadequate Encryption Strength

IBM Security Identity Governance and Intelligence 5.2 through 5.2.4.1 Virtual Appliance supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used as a protection mechanism such as encryption or authentication, but it does not select the...

CVE-2018-5745

"managed-keys" is a feature which allows a BIND resolver to automatically maintain the keys used by trust anchors which operators configure for use in DNSSEC validation. Due to an error in the managed-keys feature it is possible for a BIND server which uses managed-keys to exit due to an assertio...

Microsoft to Kill Updates for Legacy OS Using SHA-1

Microsoft is in the process of phasing out use of the Secure Hash Algorithm 1 SHA-1 code-signing encryption to deliver Windows OS updates – announcing that customers running legacy OS versions will be required to have SHA-2 code-signing support installed on their devices by July 2019. No SHA-2...

Security Bulletin: Multiple vulnerabilities in Node.js affects IBM Rational Application Developer for WebSphere Software included in Rational Developer for i and Rational Developer for AIX and Linux

Summary Portions of IBM Rational Application Developer for WebSphere Software are shipped as a component of Rational Developer for i RPG and COBOL + Modernization Tools, Java and EGL editions, and Rational Developer for AIX and Linux. Multiple Node.js vulnerabilities have been discovered that...

CVE-2019-5754: Use of a Broken or Risky Cryptographic Algorithm

Implementation error in QUIC Networking in Google Chrome prior to 72.0.3626.81 allowed an attacker running or able to cause use of a proxy server to obtain cleartext of transport encryption via malicious network proxy...

Blockchain and Trust

In his 2008 white paper that first proposed bitcoin, the anonymous Satoshi Nakamoto concluded with: "We have proposed a system for electronic transactions without relying on trust." He was referring to blockchain, the system behind bitcoin cryptocurrency. The circumvention of trust is a great...

Debian DLA-1661-1 : mumble security update

It has been found that the mumble-server mishandles multiple concurrent requests that are persisted in the database, which allows remote attackers to cause a denial of service daemon hang or crash via a message flood. With the new security update a rate limiter is added with Leaky-Bucket algorith...

Skia - Incorrect Convexity Assumptions Leading to Buffer Overflows

Skia - Incorrect Convexity Assumptions Leading to Buffer Overflows I was looking into the root cause of https://bugs.chromium.org/p/chromium/issues/detail?id=850350. In that bug, due to precision errors, Skia generated a concave RRect, but declared it convex. Later, the RRect was transformed with...

Skia - Incorrect Convexity Assumptions Leading to Buffer Overflows

I was looking into the root cause of https://bugs.chromium.org/p/chromium/issues/detail?id=850350. In that bug, due to precision errors, Skia generated a concave RRect, but declared it convex. Later, the RRect was transformed with an affine transform and used as a clipping region for drawing...