Vulnerability identifier: #VU24078

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-5188

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
E2fsprogs
Universal components / Libraries / Libraries used by multiple products

Vendor: e2fsprogs.sourceforge.net

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the directory rehashing functionality in "rehash.c" within the "mutate_name()" function. A local user can use a specially crafted ext4 directory, trigger out-of-bounds write on the stack and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

E2fsprogs: 1.43.3 - 1.45.4

---

External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0973

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.