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    CVE-2018-1000001

    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.

    Published:Jan 11, 2018
    Last Modified:Nov 21, 2024
    EPS:Jan 31, 2018
    EPSS Score:0.44629
    CVSS Score:7.8

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Gnu
    Product
    Glibc
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation
    Vendor
    Redhat
    Product
    Virtualization Host

    Exploits

    https://www.exploit-db.com/exploits/43775/https://www.exploit-db.com/exploits/44889/https://www.exploit-db.com/exploits/43775/https://www.exploit-db.com/exploits/44889/https://www.exploit-db.com/exploits/44889https://github.com/0x00-0x00/CVE-2018-1000001https://github.com/usernameid0/tools-for-CVE-2018-1000001https://www.exploit-db.com/exploits/43775

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

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    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    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
    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/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High