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Vulnerability Details : CVE-2014-8517

The fetch_url function in usr.bin/ftp/fetch.c in tnftp, as used in NetBSD 5.1 through 5.1.4, 5.2 through 5.2.2, 6.0 through 6.0.6, and 6.1 through 6.1.5 allows remote attackers to execute arbitrary commands via a | (pipe) character at the end of an HTTP redirect.
Publish Date : 2014-11-17 Last Update Date : 2017-11-05
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- CVSS Scores & Vulnerability Types

CVSS Score
7.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 77

- Products Affected By CVE-2014-8517

# Product Type Vendor Product Version Update Edition Language
1 OS Apple Mac Os X 10.8.5 Version Details Vulnerabilities
2 OS Apple Mac Os X 10.9.5 Version Details Vulnerabilities
3 OS Apple Mac Os X 10.10.0 Version Details Vulnerabilities
4 OS Apple Mac Os X 10.10.1 Version Details Vulnerabilities
5 OS Netbsd Netbsd 5.1 Version Details Vulnerabilities
6 OS Netbsd Netbsd 5.1.1 Version Details Vulnerabilities
7 OS Netbsd Netbsd 5.1.2 Version Details Vulnerabilities
8 OS Netbsd Netbsd 5.1.3 Version Details Vulnerabilities
9 OS Netbsd Netbsd 5.1.4 Version Details Vulnerabilities
10 OS Netbsd Netbsd 5.2 Version Details Vulnerabilities
11 OS Netbsd Netbsd 5.2.1 Version Details Vulnerabilities
12 OS Netbsd Netbsd 5.2.2 Version Details Vulnerabilities
13 OS Netbsd Netbsd 6.0 Version Details Vulnerabilities
14 OS Netbsd Netbsd 6.0.1 Version Details Vulnerabilities
15 OS Netbsd Netbsd 6.0.2 Version Details Vulnerabilities
16 OS Netbsd Netbsd 6.0.3 Version Details Vulnerabilities
17 OS Netbsd Netbsd 6.0.4 Version Details Vulnerabilities
18 OS Netbsd Netbsd 6.0.5 Version Details Vulnerabilities
19 OS Netbsd Netbsd 6.0.6 Version Details Vulnerabilities
20 OS Netbsd Netbsd 6.1 Version Details Vulnerabilities
21 OS Netbsd Netbsd 6.1.1 Version Details Vulnerabilities
22 OS Netbsd Netbsd 6.1.2 Version Details Vulnerabilities
23 OS Netbsd Netbsd 6.1.3 Version Details Vulnerabilities
24 OS Netbsd Netbsd 6.1.4 Version Details Vulnerabilities
25 OS Netbsd Netbsd 6.1.5 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Apple Mac Os X 4
Netbsd Netbsd 21

- References For CVE-2014-8517

https://www.exploit-db.com/exploits/43112/
EXPLOIT-DB 43112
https://security.gentoo.org/glsa/201611-05
GENTOO GLSA-201611-05
http://support.apple.com/HT204244 CONFIRM
http://lists.opensuse.org/opensuse-updates/2014-11/msg00029.html
SUSE openSUSE-SU-2014:1383
http://seclists.org/oss-sec/2014/q4/464
MLIST [oss-security] 20141028 Re: ftp(1) can be made execute arbitrary commands by malicious webserver
http://seclists.org/oss-sec/2014/q4/459
MLIST [oss-security] 20141028 ftp(1) can be made execute arbitrary commands by malicious webserver
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2014-013.txt.asc
NETBSD NetBSD-SA2014-013
http://lists.apple.com/archives/security-announce/2015/Jan/msg00003.html
APPLE APPLE-SA-2015-01-27-4

- Metasploit Modules Related To CVE-2014-8517

tnftp "savefile" Arbitrary Command Execution
This module exploits an arbitrary command execution vulnerability in tnftp's handling of the resolved output filename - called "savefile" in the source - from a requested resource. If tnftp is executed without the -o command-line option, it will resolve the output filename from the last component of the requested resource. If the output filename begins with a "|" character, tnftp will pass the fetched resource's output to the command directly following the "|" character through the use of the popen() function.
Module type : exploit Rank : excellent Platforms : Unix


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