#VU75915 OS Command Injection in emacs (Red Hat package) - CVE-2023-2491

Vulnerability identifier: #VU75915

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/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-2023-2491

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
emacs (Red Hat package)
Operating systems & Components / Operating system package or component

Vendor: Red Hat Inc.

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to a missing fix for #VU74578 (CVE-2023-28617). A remote attacker can trick the victim to open a specially crafted file and execute arbitrary OS commands on the target system via a file name or directory name that contains shell metacharacters.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

emacs (Red Hat package): before 27.2-8.el9_2.1

---

External links
https://bugzilla.redhat.com/show_bug.cgi?id=2192873

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.