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Vulnerability record · CVE-2016-6253 · published 20 January 2017

CVE-2016-6253: Netbsd link following vulnerability

Netbsd · Netbsd

mail.local in NetBSD versions 6.0 through 6.0.6, 6.1 through 6.1.5, and 7.0 allows local users to change ownership of or append data to arbitrary files on the target system via a symlink attack on the user mailbox.

7.8 CVSS 3.0 High EPSS 3.6% · top 11.1% CWE-59 · Link following
7.8CVSS 3.0 base score, v2 7.2
3.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References, 10 tagged exploit
17 Jun 2026Last modified by NVD

Description

mail.local in NetBSD versions 6.0 through 6.0.6, 6.1 through 6.1.5, and 7.0 allows local users to change ownership of or append data to arbitrary files on the target system via a symlink attack on the user mailbox.

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
http://akat1.pl/?id=2 ExploitThird Party Advisory
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2016-006.txt.asc Vendor Advisory
http://packetstormsecurity.com/files/138021/NetBSD-mail.local-8-Local-Root.html ExploitThird Party AdvisoryVDB Entry
http://www.rapid7.com/db/modules/exploit/unix/local/netbsd_mail_local ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/92101 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1036429 Third Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/40141/ ExploitThird Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/40385/ ExploitThird Party AdvisoryVDB Entry
http://akat1.pl/?id=2 ExploitThird Party Advisory
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2016-006.txt.asc Vendor Advisory
http://packetstormsecurity.com/files/138021/NetBSD-mail.local-8-Local-Root.html ExploitThird Party AdvisoryVDB Entry
http://www.rapid7.com/db/modules/exploit/unix/local/netbsd_mail_local ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/92101 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1036429 Third Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/40141/ ExploitThird Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/40385/ ExploitThird Party AdvisoryVDB Entry

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Related vulnerabilities

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

10.0CVE-2006-4304Freebsd vulnerabilityBuffer overflow in the sppp driver in FreeBSD 4.11 through 6.1, NetBSD 2.0 through 4.0 beta before 20060823, and OpenBSD 3.8 and 3.9 before 20060902 …EPSS 12%10.0CVE-2003-0694Sendmail prescan buffer overflow allows remote code executionThe prescan function in Sendmail 8.12.9 contains a buffer overflow reachable through crafted email addresses, as demonstrated via the parseaddr funct…EPSS 66%analysed10.0CVE-2002-1337Sendmail crackaddr buffer overflow allows remote code executionSendmail versions 5.79 through 8.12.7 contain a buffer overflow in the crackaddr function in headers.c, triggered by specially formatted sender and r…EPSS 73%analysed10.0CVE-2001-0554Mit kerberos classic buffer overflow vulnerabilityBuffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute arbitrary commands via a set of op…EPSS 39%10.0CVE-2001-0247Mit kerberos 5 vulnerabilityBuffer overflows in BSD-based FTP servers allows remote attackers to execute arbitrary commands via a long pattern string containing a {} sequence, a…EPSS 19%10.0CVE-2001-0053David madore ftpd-bsd vulnerabilityOne-byte buffer overflow in replydirname function in BSD-based ftpd allows remote attackers to gain root privileges.EPSS 18%10.0CVE-1999-0009Data general dg ux vulnerabilityInverse query buffer overflow in BIND 4.9 and BIND 8 Releases.EPSS 29%10.0CVE-1999-0323Bsdi bsd os vulnerabilityFreeBSD mmap function allows users to modify append-only or immutable files.EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2016-6253), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.