Ubuntu Security Update USN-4594-1: Quassel vulnerabilities

[LinuxBot]

It was discovered that Quassel incorrectly handled Qdatastream protocol. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2018-1000178) It was discovered that Quassel incorrectly handled certain login requests. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2018-1000179)

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