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    CVE-2009-1786

    The malloc subsystem in libc in IBM AIX 5.3 and 6.1 allows local users to create or overwrite arbitrary files via a symlink attack on the log file associated with the MALLOCDEBUG environment variable.

    Published:May 26, 2009
    Last Modified:Apr 23, 2026
    EPS:May 26, 2009
    EPSS Score:0.00159
    CVSS Score:6.9

    Affected Products

    Vendor
    Ibm
    Product
    Aix

    Exploits

    https://www.exploit-db.com/exploits/33001

    Related CVEs

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    CVE-2026-19449 (CVSS 8.8) — IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 has a vulnerability in cmdnim that may allow an unprivileged loc…
    CVE-2026-19448 (CVSS 6.5) — IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 A stack memory corruption vulnerability exists in the AIX IPsec …
    CVE-2026-19446 (CVSS 7.5) — IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 allows a remote unauthenticated attacker can send a crafted UDP …
    CVE-2026-19442 (CVSS 8.2) — IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 has a pointer validation flaw exists in the AIX Virtual SCSI (vS…
    CVE-2026-19437 (CVSS 8.1) — IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to a…
    CVE-2026-18835 (CVSS 9.9) — IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote authenticated attacker to execute arbitrary…
    CVE-2026-18840 (CVSS 8.2) — IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to execute arbitrary code due to im…
    CVE-2026-18842 (CVSS 8.4) — IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to gain elevated privileges due to …

    References

    http://aix.software.ibm.com/aix/efixes/security/libc_advisory.asc
    http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=802
    http://secunia.com/advisories/35146
    http://securitytracker.com/id?1022261
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50121
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50129
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50139
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50445
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50447
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50500
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50517
    http://www.osvdb.org/54617
    http://www.securityfocus.com/bid/35034
    http://www.vupen.com/english/advisories/2009/1380
    https://exchange.xforce.ibmcloud.com/vulnerabilities/50636
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6276
    https://www.exploit-db.com/exploits/9306
    http://aix.software.ibm.com/aix/efixes/security/libc_advisory.asc
    http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=802
    http://secunia.com/advisories/35146
    http://securitytracker.com/id?1022261
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50121
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50129
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50139
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50445
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50447
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50500
    http://www.ibm.com/support/docview.wss?uid=isg1IZ50517
    http://www.osvdb.org/54617
    http://www.securityfocus.com/bid/35034
    http://www.vupen.com/english/advisories/2009/1380
    https://exchange.xforce.ibmcloud.com/vulnerabilities/50636
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6276
    https://www.exploit-db.com/exploits/9306

    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