What’s Vulnerable › Vulnerabilities

CVE-2018-1000001

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 13.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-01-31 · updated 2026-06-17
• Weakness: CWE-787

Description

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.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 17.10
• GNU C Library (glibc): through 2.26
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 7.0
• RedHat Virtualization Host: 4.0

References

• http://seclists.org/oss-sec/2018/q1/38
• http://www.securityfocus.com/bid/102525
• http://www.securitytracker.com/id/1040162
• https://access.redhat.com/errata/RHSA-2018:0805
• https://security.netapp.com/advisory/ntap-20190404-0003/
• https://usn.ubuntu.com/3534-1/
• https://usn.ubuntu.com/3536-1/
• https://www.exploit-db.com/exploits/43775/
• https://www.exploit-db.com/exploits/44889/
• https://www.halfdog.net/Security/2017/LibcRealpathBufferUnderflow/
• http://seclists.org/oss-sec/2018/q1/38
• http://www.securityfocus.com/bid/102525

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