HexBrain

Weblate · Report #223653

demo.weblate.org is vulnerable to SWEET32 Vulnerability

Validstatus
lowseverity
2upvotes
17 May 2017disclosed

How it was found

Cryptographic protocols like TLS, SSH, IPsec, and OpenVPN commonly use block cipher algorithms, such as AES, Triple-DES, and Blowfish, to encrypt data between clients and servers. To use such algorithms, the data is broken into fixed-length chunks, called blocks, and each block is encrypted separately according to a mode of operation. Older block ciphers, such as Triple-DES and Blowfish use a block size of 64 bits, whereas AES uses a block size of 128 bits. A attacker can can decrypt victim data using Sweet32 birthday attck vulnerability over wifi or (local network) PoC:

  1. open nmap and type: nmap --script ssl-enum-ciphers demo.weblate.org 2.and wait until it finishes the scan
  2. here are the results 64-bit block cipher 3DES vulnerable to SWEET32 attack Key exchange (secp192r1) of lower strength than certificate key

see the attachment please....

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original