#VU90987 Link following in postgresql-common (Debian package) - CVE-2017-8806

Vulnerability identifier: #VU90987

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-8806

CWE-ID: CWE-59

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
postgresql-common (Debian package)
Operating systems & Components / Operating system package or component

Vendor: Debian

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of symbolic links in the pg_ctlcluster, pg_createcluster, and pg_upgradecluster script files. A local user can send a specially-crafted request and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

postgresql-common (Debian package): before 181+deb9u1

---

External links
https://www.ibm.com/support/pages/node/7108821

---

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.