CVE-2018-15686: high-severity vulnerability in systemd
systemd: reexec state injection: fgets() on overlong lines leads to line splitting
Published · Updated
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41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7epss 2.3%
from disclosure to weapon3 days
Published on NVDOct 26
1st PoC+3d
A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. Affected releases are systemd versions up to and including 239.
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
systemd · systemdpublic PoCs found — 3✓ VexDay Proof
exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/45714githubgithub.com/hpcprofessional/remediate_cesa_2019_2091★ 0cve_referencewww.exploit-db.com/exploits/45714/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — systemd
In the same product, most dangerous first.
CVE-2018-15688HIGHOut-of-Bounds write in systemd-networkd dhcpv6 option handlingEPSS 1.8%CVE-2018-15687HIGHsystemd: chown_one() can dereference symlinksEPSS 1.1%CVE-2012-1101—CVE-2012-1101EPSS 0.4%CVE-2026-40227MEDIUMCVE-2026-40227EPSS 0.2%CVE-2026-40228LOWCVE-2026-40228EPSS 0.2%CVE-2026-40225MEDIUMCVE-2026-40225EPSS 0.1%
References
https://access.redhat.com/errata/RHSA-2019:2091https://access.redhat.com/errata/RHSA-2019:3222https://access.redhat.com/errata/RHSA-2020:0593https://github.com/systemd/systemd/pull/10519https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3Ehttps://lists.debian.org/debian-lts-announce/2018/11/msg00017.htmlhttps://security.gentoo.org/glsa/201810-10https://usn.ubuntu.com/3816-1/https://www.exploit-db.com/exploits/45714/https://www.oracle.com//security-alerts/cpujul2021.htmlhttp://www.securityfocus.com/bid/105747