Re: Is CVE-2024-30203 bogus? (Emacs)

                							

                <!--X-Body-Begin-->
<!--X-User-Header-->

oss-sec
mailing list archives
<!--X-User-Header-End-->
<!--X-TopPNI-->

By Date

By Thread

</form>

<!--X-TopPNI-End-->
<!--X-MsgBody-->
<!--X-Subject-Header-Begin-->
Re: Is CVE-2024-30203 bogus? (Emacs)

<!--X-Subject-Header-End-->
<!--X-Head-of-Message-->

From: Eli Zaretskii &lt;eliz () gnu org&gt;

Date: Mon, 08 Apr 2024 14:38:35 +0300

<!--X-Head-of-Message-End-->
<!--X-Head-Body-Sep-Begin-->

<!--X-Head-Body-Sep-End-->
<!--X-Body-of-Message-->
From: Sean Whitton &lt;spwhitton () spwhitton name&gt;
Cc: emacs () packages debian org, emacs-devel () gnu org,
 oss-security () lists openwall com
Date: Mon, 08 Apr 2024 15:05:21 +0800

The description for CVE-2024-30203 is

    In Emacs before 29.3, Gnus treats inline MIME contents as trusted.

and for CVE-2024-30204 is

    In Emacs before 29.3, LaTeX preview is enabled by default for e-mail
    attachments.

but I think these commits

* ccc188fcf98..: Ihor Radchenko 2024-02-20 * lisp/files.el
  (untrusted-content): New variable.
* 937b9042ad7..: Ihor Radchenko 2024-02-20 * lisp/gnus/mm-view.el
  (mm-display-inline-fontify): Mark contents untrusted.
* 6f9ea396f49..: Ihor Radchenko 2024-02-20 org-latex-preview: Add
  protection when `untrusted-content' is non-nil

fix only a single problem, right?  But we have two CVEs.

It seems to me that either

- CVE-2024-30203 is just bogus, based on a misunderstanding by the CVEs
  assigner of exactly what the vulnerabilities were

- CVE-2024-30203 is legitimate, and we have only fixed one possible way
  in which Gnus treats inline MIME content as trusted.

I think it's the first one -- can you confirm?

I'm not Ihor, but I cannot agree with you.  Those changes fixed two
problems, not one: both the fact that by default MIME attachments are
treated in a way that can execute arbitrary code, and the fact that
maliciously-constructed LaTeX attachment could exhaust all free space
on your disk.

<!--X-Body-of-Message-End-->
<!--X-MsgBody-End-->
<!--X-Follow-Ups-->

<!--X-Follow-Ups-End-->
<!--X-References-->
<!--X-References-End-->
<!--X-BotPNI-->

By Date

By Thread

Current thread:

Is CVE-2024-30203 bogus? (Emacs) Sean Whitton (Apr 08)

Re: Is CVE-2024-30203 bogus? (Emacs) Eli Zaretskii (Apr 08)

<!--X-BotPNI-End-->
<!--X-User-Footer-->
<!--X-User-Footer-End-->