Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code or information disclosure. For the stable distribution (buster), these problems have been fixed in
Beast Glatisant and Jelmer Vernooij reported that python-aiohttp, a async HTTP client/server framework, is prone to an open redirect vulnerability. A maliciously crafted link to an aiohttp-based web-server could redirect the browser to a different website.
Felix Weinmann reported a flaw in the handling of combining characters in screen, a terminal multiplexer with VT100/ANSI terminal emulation, which can result in denial of service, or potentially the execution of arbitrary code via a specially crafted UTF-8 character sequence.
A vulnerability in the Certificate List Exact Assertion validation was discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. An unauthenticated remote attacker can take advantage of this flaw to cause a denial of service (slapd daemon crash)