CVE-2018-1000001

HIGHNVD 7.87.8—Weaponized

7.8

In glibc 2.26 and earlier there is confusion in the usage of getcwd() by realpath() which can be used to write before the destination buffer leading to a buffer underflow and potential code execution.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 97.5%
KEV: Not listed

Published

January 31, 2018

Last Modified

November 21, 2024

References (20)

cve@mitrehttp://seclists.org/oss-sec/2018/q1/38
cve@mitrehttp://www.securityfocus.com/bid/102525
cve@mitrehttp://www.securitytracker.com/id/1040162
cve@mitrehttps://access.redhat.com/errata/RHSA-2018:0805
cve@mitrehttps://security.netapp.com/advisory/ntap-20190404-0003/
cve@mitrehttps://usn.ubuntu.com/3534-1/
cve@mitrehttps://usn.ubuntu.com/3536-1/
cve@mitrehttps://www.exploit-db.com/exploits/43775/
cve@mitrehttps://www.exploit-db.com/exploits/44889/
cve@mitrehttps://www.halfdog.net/Security/2017/LibcRealpathBufferUnderflow/
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/oss-sec/2018/q1/38
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/102525
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1040162
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:0805
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20190404-0003/

Patch Availability(4)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	nscd (2.23-0ubuntu10) @ xenial	2026-05-23	ubuntu
ubuntu	libc6 (2.15-0ubuntu10.21) @ precise	2026-05-23	ubuntu
ubuntu	musl (1.1.9-1ubuntu0.1~esm2) @ xenial	2026-05-23	ubuntu
redhat	glibc-0:2.17-222.el7	2018-04-10	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-787Out-of-bounds Write

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 13× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 02:09 UTCEG score recompute
2026-05-23 02:09 UTCVendor advisory
2026-05-23 02:09 UTCGHSA enrichment

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-44889✓ verified
First seen Jun 13, 2018
glibc - 'realpath()' Privilege Escalation (Metasploit)
Open source ↗
GitHub PoC0x00-0x00/CVE-2018-1000001
First seen Feb 7, 2018
glibc getcwd() local privilege escalation compiled binaries
Open source ↗
Exploit-DBEDB-43775✓ verified
First seen Jan 16, 2018
glibc < 2.26 - 'getcwd()' Local Privilege Escalation
Open source ↗
Metasploitexploit/linux/local/glibc_realpath_priv_esc✓ verified
First seen Jan 16, 2018
glibc 'realpath()' Privilege Escalation
Open source ↗

Frequently asked(5)

What is CVE-2018-1000001?

CVE-2018-1000001 is a high vulnerability published on January 31, 2018. In glibc 2.26 and earlier there is confusion in the usage of getcwd() by realpath() which can be used to write before the destination buffer leading to a buffer underflow and potential code execution.

When was CVE-2018-1000001 disclosed?

CVE-2018-1000001 was first published in the National Vulnerability Database on January 31, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-1000001 actively exploited?

CVE-2018-1000001 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-1000001?

CVE-2018-1000001 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2018-1000001?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-1000001, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-1000001

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CVE-2018-1000001

Published

Last Modified

References (20)

Patch Availability(4)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-1000001?

Same vendor

Same CWE

CVE-2018-1000001

📅 Published

🔄 Last Modified

🔗 References (20)

Patch Availability(4)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-1000001?

🔗 Related CVEs(same vendor + same CWE)

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References (20)

Frequently asked(5)

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