Vulnerability identifier: #VU32879

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15396

CWE-ID: CWE-269

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
HylaFAX
Client/Desktop applications / Messaging software

Vendor: Hylafax.org

Description

The vulnerability allows a local user to escalate privileges on the system.

In HylaFAX+ through 7.0.2 and HylaFAX Enterprise, the faxsetup utility calls chown on files in user-owned directories. By winning a race, a local attacker could use this to escalate his privileges to root.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

HylaFAX: 7.0.0 - 7.0.2

---

External links
http://bugzilla.suse.com/show_bug.cgi?id=1173521
http://security.gentoo.org/glsa/202007-06
http://sourceforge.net/p/hylafax/HylaFAX+/2534/

---

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.