Ubuntu Security Notice 4922-2 - USN-4922-1 fixed a vulnerability in Ruby. This update provides the corresponding update for Ubuntu 21.04. Juho Nurminen discovered that the REXML gem bundled with Ruby incorrectly parsed and serialized XML documents. A remote attacker could possibly use this issue to perform an XML round-trip attack. Various other issues were also addressed.
96b1c27761aa4515d434bb88738c784659440ebe67ff98e0ef81fba1977acc46