Debian: DSA-4991-1: mailman security update

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Several vulnerabilities were discovered in mailman, a web-based mailing list manager, which could result in arbitrary content injection via the options and private archive login pages, and CSRF attacks or privilege escalation via the user options page.

Debian: DSA-4987-1: squashfs-tools security update

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Richard Weinberger reported that unsquashfs in squashfs-tools, the tools to create and extract Squashfs filesystems, does not check for duplicate filenames within a directory. An attacker can take advantage of this flaw for writing to arbitrary files to the filesystem if a malformed

Debian: DSA-4984-1: flatpak security update

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It was discovered that sandbox restrictions in Flatpak, an application deployment framework for desktop apps, could be bypassed for a Flatpak app with direct access to AF_UNIX sockets, by manipulating the VFS using mount-related syscalls that are not blocked by Flatpak's denylist