CVE-2018-15687

systemd: chown_one() can dereference symlinks

CVSS 7.8 HIGHEPSS 1.1%CWE-362

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 7.8EPSS 1.1%KEV nãoPoC públicaNuclei —Metasploit —Patch referenciado

Lifecycle

26 Oct 2018Published on NVD

29 Oct 2018Public PoC

Recommendation: Plan a near-term fix — a public PoC already exists.

A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239.

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

systemd · systemd

public PoCs found — 2

cve_referencewww.exploit-db.com/exploits/45715/unverified exploitdbwww.exploit-db.com/exploits/45715unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://github.com/systemd/systemd/pull/10517/commits https://security.gentoo.org/glsa/201810-10 https://usn.ubuntu.com/3816-1/https://www.exploit-db.com/exploits/45715/http://www.securityfocus.com/bid/105748