Important: emacs

Issue Overview:

GNU Emacs through 28.2 allows attackers to execute commands via shell metacharacters in the name of a source-code file, because lib-src/etags.c uses the system C library function in its implementation of the etags program. For example, a victim may use the “etags -u *” command (suggested in the etags documentation) in a situation where the current working directory has contents that depend on untrusted input. (CVE-2022-48337)

An issue was discovered in GNU Emacs through 28.2. In ruby-mode.el, the ruby-find-library-file function has a local command injection vulnerability. The ruby-find-library-file function is an interactive function, and bound to C-c C-f. Inside the function, the external command gem is called through shell-command-to-string, but the feature-name parameters are not escaped. Thus, malicious Ruby source files may cause commands to be executed. (CVE-2022-48338)

An issue was discovered in GNU Emacs through 28.2. htmlfontify.el has a command injection vulnerability. In the hfy-istext-command function, the parameter file and parameter srcdir come from external input, and parameters are not escaped. If a file name or directory name contains shell metacharacters, code may be executed. (CVE-2022-48339)

Affected Packages:

emacs

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update emacs to update your system.

New Packages:

aarch64:  
    emacs-27.2-4.amzn2.0.3.aarch64  
    emacs-lucid-27.2-4.amzn2.0.3.aarch64  
    emacs-nox-27.2-4.amzn2.0.3.aarch64  
    emacs-common-27.2-4.amzn2.0.3.aarch64  
    emacs-devel-27.2-4.amzn2.0.3.aarch64  
    emacs-debuginfo-27.2-4.amzn2.0.3.aarch64  
  
i686:  
    emacs-27.2-4.amzn2.0.3.i686  
    emacs-lucid-27.2-4.amzn2.0.3.i686  
    emacs-nox-27.2-4.amzn2.0.3.i686  
    emacs-common-27.2-4.amzn2.0.3.i686  
    emacs-devel-27.2-4.amzn2.0.3.i686  
    emacs-debuginfo-27.2-4.amzn2.0.3.i686  
  
noarch:  
    emacs-terminal-27.2-4.amzn2.0.3.noarch  
    emacs-filesystem-27.2-4.amzn2.0.3.noarch  
  
src:  
    emacs-27.2-4.amzn2.0.3.src  
  
x86_64:  
    emacs-27.2-4.amzn2.0.3.x86_64  
    emacs-lucid-27.2-4.amzn2.0.3.x86_64  
    emacs-nox-27.2-4.amzn2.0.3.x86_64  
    emacs-common-27.2-4.amzn2.0.3.x86_64  
    emacs-devel-27.2-4.amzn2.0.3.x86_64  
    emacs-debuginfo-27.2-4.amzn2.0.3.x86_64  

Additional References

Red Hat: CVE-2022-48337, CVE-2022-48338, CVE-2022-48339

Mitre: CVE-2022-48337, CVE-2022-48338, CVE-2022-48339