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Vulnerability record · CVE-2009-1236 · published 2 April 2009

CVE-2009-1236: Apple mac os x memory buffer overflow vulnerability

Apple · Mac Os X

Heap-based buffer overflow in the AppleTalk networking stack in XNU 1228.3.13 and earlier on Apple Mac OS X 10.5.6 and earlier allows remote attackers to cause a denial of service (system crash) via a ZIP NOTIFY (aka ZIPOP_NOTIFY) packet that overwrites a certain ifPort structure member.

10.0 CVSS 2.0 High EPSS 8.4% · top 5.2% CWE-119 · Memory buffer overflow
10.0CVSS 2.0 base score
8.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

Heap-based buffer overflow in the AppleTalk networking stack in XNU 1228.3.13 and earlier on Apple Mac OS X 10.5.6 and earlier allows remote attackers to cause a denial of service (system crash) via a ZIP NOTIFY (aka ZIPOP_NOTIFY) packet that overwrites a certain ifPort structure member.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://secunia.com/advisories/34424
http://www.digit-labs.org/files/exploits/xnu-appletalk-zip.c Exploit
http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181
http://www.securityfocus.com/bid/34201 Exploit
https://www.exploit-db.com/exploits/8262
http://secunia.com/advisories/34424
http://www.digit-labs.org/files/exploits/xnu-appletalk-zip.c Exploit
http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181
http://www.securityfocus.com/bid/34201 Exploit
https://www.exploit-db.com/exploits/8262

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-1236), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.