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aaeaac8595
Fixes the following security issues:
- CVE-2021-32918: DoS via insufficient memory consumption controls
It was discovered that default settings leave Prosody susceptible to
remote unauthenticated denial-of-service (DoS) attacks via memory
exhaustion when running under Lua 5.2 or Lua 5.3. Lua 5.2 is the default
and recommended Lua version for Prosody 0.11.x series.
- CVE-2021-32920: DoS via repeated TLS renegotiation causing excessive CPU
consumption
It was discovered that Prosody does not disable SSL/TLS renegotiation,
even though this is not used in XMPP. A malicious client may flood a
connection with renegotiation requests to consume excessive CPU resources
on the server.
- CVE-2021-32921: Use of timing-dependent string comparison with sensitive
values
It was discovered that Prosody does not use a constant-time algorithm for
comparing certain secret strings when running under Lua 5.2 or later.
This can potentially be used in a timing attack to reveal the contents of
secret strings to an attacker.
- CVE-2021-32917: Use of mod_proxy65 is unrestricted in default
configuration
mod_proxy65 is a file transfer proxy provided with Prosody to facilitate
the transfer of files and other data between XMPP clients.
It was discovered that the proxy65 component of Prosody allows open access
by default, even if neither of the users have an XMPP account on the local
server, allowing unrestricted use of the server’s bandwidth.
- CVE-2021-32919: Undocumented dialback-without-dialback option insecure
The undocumented option ‘dialback_without_dialback’ enabled an
experimental feature for server-to-server authentication. A flaw in this
feature meant it did not correctly authenticate remote servers, allowing a
remote server to impersonate another server when this option is enabled.
For more details, see the advisory:
https://prosody.im/security/advisory_20210512/
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 9c108afab8)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches