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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…
Medium6.9EPSS 0.67%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium6.9 | AV:L/AC:M/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 0.67% · top 48% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.9.
Weakness
Affected products
n/a
- affected n/a
References (17)
- http://aix.software.ibm.com/aix/efixes/security/libc_advisory.asc (opens in a new tab)x_refsource_CONFIRMx_transferred
- IZ50445 (opens in a new tab)vendor-advisoryx_refsource_AIXAPARx_transferred
- oval:org.mitre.oval:def:6276 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- IZ50447 (opens in a new tab)vendor-advisoryx_refsource_AIXAPARx_transferred
- 54617 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- IZ50121 (opens in a new tab)vendor-advisoryx_refsource_AIXAPARx_transferred
- 20090520 IBM AIX libc MALLOCDEBUG File Overwrite Vulnerability (opens in a new tab)third-party-advisoryx_refsource_IDEFENSEx_transferred
- 35034 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 9306 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 1022261 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- ADV-2009-1380 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- aix-mallocdebug-privilege-escalation(50636) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- IZ50517 (opens in a new tab)vendor-advisoryx_refsource_AIXAPARx_transferred
- 35146 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- IZ50500 (opens in a new tab)vendor-advisoryx_refsource_AIXAPARx_transferred
- IZ50129 (opens in a new tab)vendor-advisoryx_refsource_AIXAPARx_transferred
- IZ50139 (opens in a new tab)vendor-advisoryx_refsource_AIXAPARx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2009-1786)Record last updated .