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CVE-2024-53920

Date: November 26, 2024

In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion that allows attackers to execute arbitrary code. (This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.)

Language: EMACS_LISP

Severity Score

Related Resources (10)

https://security-tracker.debian.org/tracker/CVE-2024-53920
https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-30.1
https://yhetil.org/emacs/CAFXAjY5f4YfHAtZur1RAqH34UbYU56_t6t2Er0YEh1Sb7-W=hg@mail.gmail.com/
https://git.savannah.gnu.org/cgit/emacs.git/tag/?h=emacs-30.0.92
https://git.savannah.gnu.org/cgit/emacs.git/tree/ChangeLog.4
https://eshelyaron.com/posts/2024-11-27-emacs-aritrary-code-execution-and-how-to-avoid-it.html
https://nvd.nist.gov/vuln/detail/CVE-2024-53920
https://yhetil.org/emacs/CAFXAjY5f4YfHAtZur1RAqH34UbYU56_t6t2Er0YEh1Sb7-W=hg%40mail.gmail.com/
https://news.ycombinator.com/item?id=42256409
https://www.mend.io/vulnerability-database/CVE-2024-53920

Severity Score

Weakness Type (CWE)

Improper Control of Generation of Code ('Code Injection')

CWE-94

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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