Input validation error in Emacs - CVE-2017-14482
Published: September 14, 2017 / Updated: August 4, 2020
Vulnerability identifier: #VU33781
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2017-14482
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
Emacs
Emacs
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
GNU Emacs before 25.3 allows remote attackers to execute arbitrary code via email with crafted "Content-Type: text/enriched" data containing an x-display XML element that specifies execution of shell commands, related to an unsafe text/enriched extension in lisp/textmodes/enriched.el, and unsafe Gnus support for enriched and richtext inline MIME objects in lisp/gnus/mm-view.el. In particular, an Emacs user can be instantly compromised by reading a crafted email message (or Usenet news article).
How to mitigate CVE-2017-14482
Install update from vendor's website.
Sources
- http://www.debian.org/security/2017/dsa-3975
- http://www.openwall.com/lists/oss-security/2017/09/11/1
- https://access.redhat.com/errata/RHSA-2017:2771
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28350
- https://git.savannah.gnu.org/cgit/emacs.git/commit/?h=emacs-25&id=9ad0fcc54442a9a01d41be19880250783426db70
- https://security.gentoo.org/glsa/201801-07
- https://www.debian.org/security/2017/dsa-3970
- https://www.gnu.org/software/emacs/index.html#Releases