Radicale before 1.1 allows remote authenticated users to bypass owner_write and owner_only limitations via regex metacharacters in the user name, as demonstrated by ".*".

Version 1.1.1

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Radicale reports :

The multifilesystem backend allows access to arbitrary files on all platforms.

Prevent regex injection in rights management.

Two vulnerabilities were fixed in radicale, a CardDAV/CalDAV server.

  - CVE-2015-8747     The (not configured by default and not available on     Wheezy) multifilesystem storage backend allows read and     write access to arbitrary files (still subject to the     DAC permissions of the user the radicale server is     running as).

  - CVE-2015-8748     If an attacker is able to authenticate with a user name     like `.*', he can bypass read/write limitations imposed     by regex-based rules, including the built-in rules     `owner_write' (read for everybody, write for the     calendar owner) and `owner_only' (read and write for the     the calendar owner).

Several issues have been discovered by Unrud in Radicale, a calendar and addressbook server. A remote attacker could exploit these vulnerabilities and call arbitrary functions by sending crafted HTTP requests.

CVE-2015-8748   Prevent regex injection in rights management.
  Prevent crafted HTTP request from calling arbitrary functions.

CVE-2015-8747   The multifilesystem backend allows access to arbitrary files on all platforms. (Squeeze is not affected because the multifilesystem backend does not exist in this version.)

For Debian 6 'Squeeze', these problems have been fixed in version 0.3-2+deb6u1.

We recommend that you upgrade your radicale packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
89637	Fedora 23 : radicale-1.1.1-1.fc23 (2016-f048c43393)	Nessus	Fedora Local Security Checks	critical
89618	Fedora 22 : radicale-1.1.1-1.fc22 (2016-cf9e2429b5)	Nessus	Fedora Local Security Checks	critical
88505	FreeBSD : radicale -- multiple vulnerabilities (ff824eea-c69c-11e5-96d6-14dae9d210b8)	Nessus	FreeBSD Local Security Checks	critical
88497	Debian DSA-3462-1 : radicale - security update	Nessus	Debian Local Security Checks	critical
88388	Debian DLA-403-1 : radicale security update	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2015-8748

medium

Tenable Plugins

critical

critical

critical

critical

critical