Netscape Communicator URL Read Vulnerability

BID:1546

Info

Netscape Communicator URL Read Vulnerability

Bugtraq ID: 1546
Class: Access Validation Error
CVE:
Remote: Yes
Local: No
Published: Aug 03 2000 12:00AM
Updated: Aug 03 2000 12:00AM
Credit: This vulnerability was found by Dan Brumleve <[email protected]>.
Vulnerable: Netscape Communicator 4.74
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional SP2
 - Microsoft Windows 2000 Professional SP1
 - Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows 98SE
- Microsoft Windows NT 4.0 SP6a
 - Microsoft Windows NT 4.0 SP6
 - Microsoft Windows NT 4.0 SP5
 - Microsoft Windows NT 4.0 SP4
 - Microsoft Windows NT 4.0 SP3
 - Microsoft Windows NT 4.0 SP2
 - Microsoft Windows NT 4.0 SP1
 - Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.73
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional SP2
 - Microsoft Windows 2000 Professional SP1
 - Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows 98SE
- Microsoft Windows NT 4.0 SP6a
 - Microsoft Windows NT 4.0 SP6
 - Microsoft Windows NT 4.0 SP5
 - Microsoft Windows NT 4.0 SP4
 - Microsoft Windows NT 4.0 SP3
 - Microsoft Windows NT 4.0 SP2
 - Microsoft Windows NT 4.0 SP1
 - Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.72
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional SP2
 - Microsoft Windows 2000 Professional SP1
 - Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0 SP6a
 - Microsoft Windows NT 4.0 SP6
 - Microsoft Windows NT 4.0 SP5
 - Microsoft Windows NT 4.0 SP4
 - Microsoft Windows NT 4.0 SP3
 - Microsoft Windows NT 4.0 SP2
 - Microsoft Windows NT 4.0 SP1
 - Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.61
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.51
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.6
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.5 BETA
Netscape Communicator 4.5
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.4
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.0
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.08
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.07
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Netscape Communicator 4.06
- Caldera OpenLinux Desktop 2.3
- Caldera OpenLinux eBuilder 3.0
- Mandriva Linux Mandrake 7.1
- Mandriva Linux Mandrake 7.0
- Mandriva Linux Mandrake 6.1
- Mandriva Linux Mandrake 6.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
 - Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.1 sparc
 - Redhat Linux 6.1 i386
 - Redhat Linux 6.1 alpha
 - Redhat Linux 6.0 sparc
 - Redhat Linux 6.0 alpha
 - Redhat Linux 6.0
- Redhat Linux 5.2 sparc
 - Redhat Linux 5.2 i386
 - Redhat Linux 5.2 alpha
 - SCO eDesktop 2.4
- SCO eServer 2.3
- SuSE Linux 7.0
Not Vulnerable: Netscape Netscape 6.0
- Microsoft Windows 2000 Professional
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0

Discussion

Netscape Communicator URL Read Vulnerability

A flaw in Netscape Communicator's implementation of Java allows malicious applets to read any resource reachable via a URL from the local machine by using the netscape.net.URLConnection and netscape.net.URLInputSteam classes. This allows malicious applets to read local files as well as download data from hosts that would otherwise could be protected by a firewall.

An untrusted applet normally is no allowed to read or write to the local file system, or to open network connections to any machine other than that from which it was downloaded.. Security sensitive classes such as FileInputStream() , RandomAccessFile(), or Socket() normally check whether a class can read from a local file by calling the SecurityManager.checkRead() method or whether it connect to other hosts by calling the SecurityManager.checkConnect() method.

Netscape's netscape.net.URLConnection and netscape.net.URLInputStream classes seem to ignore or not perform these checks when passed an URLs. Thus malicious classes and read local files using URLs of the type "file://".

If the machine running the malicious applet is behind a firewall it will also be able to download resources that can be accessed via a URL, such as web server ("http://" or "https://) or FTP servers ("ftp://"), that the attacker in control of the machine from which the applet was downloaded could not. In this way a malicious applet could be used to penetrate a firewall.

Exploit / POC

Netscape Communicator URL Read Vulnerability

x

Solution / Fix

Netscape Communicator URL Read Vulnerability

Solution:
Netscape has released Netscape Communicator 4.75 which is not susceptible to this vulnerability.

Caldera recommends to disable java in your web browser and upgrade to the new packages.

SuSE recommends to upgrade to the new packages.

Debian Security has provided the following upgrades:

Source archives:
http://security.debian.org/dists/potato/updates/non-free/source/netscape4.75_4.75-1potato1.diff.gz
MD5 checksum: 99ab453006b123ade6b62d508052e8aa

http://security.debian.org/dists/potato/updates/non-free/source/netscape4.75_4.75-1potato1.dsc
MD5 checksum: b6c8220d540580c62302e51bd310273c

http://security.debian.org/dists/potato/updates/non-free/source/netscape4.75_4.75.orig.tar.gz
MD5 checksum: 291d418188dd0d859c842b8e511f40dd

http://security.debian.org/dists/potato/updates/non-free/source/netscape4.base_4.75-1.dsc
MD5 checksum: 834ccd2acc61052bf9b01f58c5adb767

http://security.debian.org/dists/potato/updates/non-free/source/netscape4.base_4.75-1.tar.gz
MD5 checksum: c9f71e888d9ce42d7317a7a8255a25f4

Intel ia32 architecture:
http://security.debian.org/dists/potato/updates/non-free/binary-i386/communicator-base-475_4.75-1potato1_i386.deb
MD5 checksum: 401b63408d1477978fe16a855b9b2a14

http://security.debian.org/dists/potato/updates/non-free/binary-i386/communicator-nethelp-475_4.75-1potato1_all.deb
MD5 checksum: 763d8c075f0200d77ce1ad91af3d4c27

http://security.debian.org/dists/potato/updates/non-free/binary-i386/communicator-smotif-475-libc5_4.75-1potato1_i386.deb
MD5 checksum: d255e35d8365486b28a6e5c02bdf7e80

http://security.debian.org/dists/potato/updates/non-free/binary-i386/communicator-smotif-475_4.75-1potato1_i386.deb
MD5 checksum: a8b595e4ba544861109e91cf2f494d67

http://security.debian.org/dists/potato/updates/non-free/binary-i386/communicator-spellchk-475_4.75-1potato1_all.deb
MD5 checksum: 2c42207d48399b1d9ea757a1ee677414

http://security.debian.org/dists/potato/updates/non-free/binary-i386/communicator_4.75-1_i386.deb
MD5 checksum: 3b67100464ed0aa6a22bef337c14798f

http://security.debian.org/dists/potato/updates/non-free/binary-i386/navigator-base-475_4.75-1potato1_i386.deb
MD5 checksum: f4ed466d94b761b3a5f252c859c1c38d

http://security.debian.org/dists/potato/updates/non-free/binary-i386/navigator-nethelp-475_4.75-1potato1_all.deb
MD5 checksum: 3e671e3bd853557df55915a395f57d39

http://security.debian.org/dists/potato/updates/non-free/binary-i386/navigator-smotif-475-libc5_4.75-1potato1_i386.deb
MD5 checksum: d46984adbf2703f26a5bbd1cff912967

http://security.debian.org/dists/potato/updates/non-free/binary-i386/navigator-smotif-475_4.75-1potato1_i386.deb
MD5 checksum: 3e7de9bb9c0c8c73519c3b7149de6af4

http://security.debian.org/dists/potato/updates/non-free/binary-i386/navigator_4.75-1_i386.deb
MD5 checksum: a4f735e76fb26bc46a99edb557e41d43

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-base-4-libc5_4.75-1_i386.deb
MD5 checksum: be2014f7b47913fc2d40dd3a2f7dc60f

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-base-475_4.75-1potato1_i386.deb
MD5 checksum: 4cae30606eb234d79c0469ad3e430ece

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-base-4_4.75-1_i386.deb
MD5 checksum: e594f5e58bfab22b5c4333d6e648b8bc

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-ja-resource-475_4.75-1potato1_all.deb
MD5 checksum: 2f5aadfe24499b6ed79d7c1810aedb70

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-java-475_4.75-1potato1_all.deb
MD5 checksum: 2b1d1abed84ac00eef02de530ad95028

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-ko-resource-475_4.75-1potato1_all.deb
MD5 checksum: b2335dabae4430a69773ba22b3d5100c

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-smotif-475-libc5_4.75-1potato1_i386.deb
MD5 checksum: 2397e4c0d8e556ea457b0095ad102d96

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-smotif-475_4.75-1potato1_i386.deb
MD5 checksum: 45f1df641dc6869f880ee32abc1c8eb2

http://security.debian.org/dists/potato/updates/non-free/binary-i386/netscape-zh-resource-475_4.75-1potato1_all.deb
MD5 checksum: 5cb68c9bf8a895488c4a75145c48c915


Netscape Communicator 4.07

Netscape Communicator 4.06

Netscape Communicator 4.08

Netscape Communicator 4.0

Netscape Communicator 4.4

Netscape Communicator 4.5 BETA

Netscape Communicator 4.5

Netscape Communicator 4.51

Netscape Communicator 4.6

Netscape Communicator 4.61

Netscape Communicator 4.72

Netscape Communicator 4.73

Netscape Communicator 4.74

References

Netscape Communicator URL Read Vulnerability

References:
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