High severity · published Nov 27, 2024
CVE-2024-53920
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…
7.8
CVSS
0.6%
EPSS
No
On KEV
Description
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.)
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EM
Emacs · Gnu
before 30.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-53920
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-53920
Third Party Advisory
https://eshelyaron.com/posts/2024-11-27-emacs-aritrary-code-execution-and-how-to-avoid-it.html
Product
https://git.savannah.gnu.org/cgit/emacs.git/tag/?h=emacs-30.0.92
Release Notes
https://git.savannah.gnu.org/cgit/emacs.git/tree/ChangeLog.4
Product
https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-30.1
Issue Tracking
https://news.ycombinator.com/item?id=42256409
Mailing List
https://yhetil.org/emacs/CAFXAjY5f4YfHAtZur1RAqH34UbYU56_t6t2Er0YEh1Sb7-W=hg@mail.gmail.com/
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