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    CVE-2000-0824

    The unsetenv function in glibc 2.1.1 does not properly unset an environmental variable if the variable is provided twice to a program, which could allow local users to execute arbitrary commands in setuid programs by specifying their own duplicate environmental variables such as LD_PRELOAD or LD_LIBRARY_PATH.

    Published:Sep 17, 1999
    Last Modified:Apr 16, 2026
    EPS:Jan 22, 2001
    EPSS Score:0.00306
    CVSS Score:7.2

    Affected Products

    Vendor
    Gnu
    Product
    Glibc

    Exploits

    http://www.securityfocus.com/bid/648http://www.securityfocus.com/bid/648https://www.exploit-db.com/exploits/19503

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-80489 (CVSS 5.9) — A flaw was found in glibc. This vulnerability allows a remote attacker to cause a denial of service (DoS) by p…
    CVE-2026-77117 (CVSS 5.9) — A flaw was found in glibc. A remote attacker could exploit this vulnerability by providing specially crafted i…
    CVE-2026-19499 (CVSS 6.8) — A flaw was found in glibc. The strfmon and strfmon_l functions are vulnerable to a buffer overflow when proces…
    CVE-2026-19542 (CVSS 4.2) — A flaw was found in glibc. An out-of-bounds array write vulnerability exists within the `tdelete` function. Th…
    CVE-2026-6368 (CVSS 2.1) — Calling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43 can cause the interface to r…
    CVE-2026-6238 (CVSS 6.5) — The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.0.1 to version 2…
    CVE-2026-5435 (CVSS 7.3) — The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail…
    CVE-2026-5450 (CVSS 9.8) — Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 t…
    CVE-2026-5928 (CVSS 7.5) — Calling the ungetwc function on a FILE stream with wide characters encoded in a character set that has overlap…
    CVE-2026-4046 (CVSS 7.5) — The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure when…

    References

    http://archives.neohapsis.com/archives/bugtraq/2000-08/0436.html
    http://archives.neohapsis.com/archives/bugtraq/2000-08/0509.html
    http://archives.neohapsis.com/archives/bugtraq/2000-08/0525.html
    http://marc.info/?l=bugtraq&m=93760201002154&w=2
    http://www.calderasystems.com/support/security/advisories/CSSA-2000-028.0.txt
    http://www.debian.org/security/2000/20000902
    http://www.linux-mandrake.com/en/updates/MDKSA-2000-040.php3
    http://www.linux-mandrake.com/en/updates/MDKSA-2000-045.php3
    http://www.novell.com/linux/security/advisories/adv5_draht_glibc_txt.html
    http://www.redhat.com/support/errata/RHSA-2000-057.html
    http://www.securityfocus.com/archive/1/79537
    http://www.securityfocus.com/bid/1639
    http://www.securityfocus.com/bid/648
    http://www.turbolinux.com/pipermail/tl-security-announce/2000-September/000020.html
    https://exchange.xforce.ibmcloud.com/vulnerabilities/5173
    http://archives.neohapsis.com/archives/bugtraq/2000-08/0436.html
    http://archives.neohapsis.com/archives/bugtraq/2000-08/0509.html
    http://archives.neohapsis.com/archives/bugtraq/2000-08/0525.html
    http://marc.info/?l=bugtraq&m=93760201002154&w=2
    http://www.calderasystems.com/support/security/advisories/CSSA-2000-028.0.txt
    http://www.debian.org/security/2000/20000902
    http://www.linux-mandrake.com/en/updates/MDKSA-2000-040.php3
    http://www.linux-mandrake.com/en/updates/MDKSA-2000-045.php3
    http://www.novell.com/linux/security/advisories/adv5_draht_glibc_txt.html
    http://www.redhat.com/support/errata/RHSA-2000-057.html
    http://www.securityfocus.com/archive/1/79537
    http://www.securityfocus.com/bid/1639
    http://www.securityfocus.com/bid/648
    http://www.turbolinux.com/pipermail/tl-security-announce/2000-September/000020.html
    https://exchange.xforce.ibmcloud.com/vulnerabilities/5173

    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