MEDIUM
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
6.9
MEDIUMCVSS 2.0
EPSS 0.67%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
6.9 MEDIUM NVD
AV:L/AC:M/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.67% 0.00666
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.00666
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.67% (0.00666) | 50.07th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.67% (0.00666) | 46.80th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.18% (0.00179) | 37.24th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 0.34th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 0.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.22% (0.03220) | 84.21th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.22% (0.03220) | 82.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.22% (0.03220) | 65.30th | v2 (v2022.01.01) |
Weaknesses (1)
References (17)
- http://aix.software.ibm.com/aix/efixes/security/libc_advisory.asc x_refsource_CONFIRMPatchVendor Advisory
- http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=802 third-party-advisoryx_refsource_IDEFENSE
- http://secunia.com/advisories/35146 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://securitytracker.com/id?1022261 vdb-entryx_refsource_SECTRACKPatch
- http://www.ibm.com/support/docview.wss?uid=isg1IZ50121 vendor-advisoryx_refsource_AIXAPAR
- http://www.ibm.com/support/docview.wss?uid=isg1IZ50129 vendor-advisoryx_refsource_AIXAPAR
- http://www.ibm.com/support/docview.wss?uid=isg1IZ50139 vendor-advisoryx_refsource_AIXAPAR
- http://www.ibm.com/support/docview.wss?uid=isg1IZ50445 vendor-advisoryx_refsource_AIXAPAR
- http://www.ibm.com/support/docview.wss?uid=isg1IZ50447 vendor-advisoryx_refsource_AIXAPAR
- http://www.ibm.com/support/docview.wss?uid=isg1IZ50500 vendor-advisoryx_refsource_AIXAPAR
- http://www.ibm.com/support/docview.wss?uid=isg1IZ50517 vendor-advisoryx_refsource_AIXAPAR
- http://www.osvdb.org/54617 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/35034 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2009/1380 vdb-entryx_refsource_VUPENVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/50636 vdb-entryx_refsource_XF
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6276 vdb-entrysignaturex_refsource_OVAL
- https://www.exploit-db.com/exploits/9306 exploitx_refsource_EXPLOIT-DB
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published May 26, 2009
Updated Aug 7, 2024
Reserved May 26, 2009
Link CVE-2009-1786
CISA Vulnrichment
Updated n/a