bzip2 Archive Inherited Symbolic Link Permissions Vulnerability

BID:4776

Info

bzip2 Archive Inherited Symbolic Link Permissions Vulnerability

Bugtraq ID: 4776
Class: Design Error
CVE:
Remote: No
Local: Yes
Published: May 20 2002 12:00AM
Updated: May 20 2002 12:00AM
Credit: Discovery of this issue is credited to Volker Schmidt and Philippe Troin.
Vulnerable: bzip2 bzip2 1.0.1
- FreeBSD FreeBSD 4.5
- FreeBSD FreeBSD 4.4
- Trustix Secure Linux 1.5
- Trustix Secure Linux 1.2
- Trustix Secure Linux 1.1
bzip2 bzip2 1.0
bzip2 bzip2 0.9.5 d
bzip2 bzip2 0.9.5 c
bzip2 bzip2 0.9.5 b
bzip2 bzip2 0.9.5 a
bzip2 bzip2 0.9 c
bzip2 bzip2 0.9 b
bzip2 bzip2 0.9 a
bzip2 bzip2 0.9
Not Vulnerable: bzip2 bzip2 1.0.2
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
+ Debian Linux 3.0
- FreeBSD FreeBSD 4.5
- FreeBSD FreeBSD 4.5
- FreeBSD FreeBSD 4.4
- FreeBSD FreeBSD 4.4
+ Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 amd64
 + Ubuntu Ubuntu Linux 5.0 4 amd64
 + Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ppc
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia64
 + Ubuntu Ubuntu Linux 4.1 ia32
 + Ubuntu Ubuntu Linux 4.1 ia32

Discussion

bzip2 Archive Inherited Symbolic Link Permissions Vulnerability

bzip2 is an open-source file compression/decompression utility for Unix and Linux variants.

bzip2 inherits the permissions of symbolic links when a file is compressed, instead of the permissions of the actual file being compressed. The result is that, under some circumstances, when the file is decompressed it will have the permissions of the symbolic link.

Exploit / POC

bzip2 Archive Inherited Symbolic Link Permissions Vulnerability

There is no exploit code required.

Solution / Fix

bzip2 Archive Inherited Symbolic Link Permissions Vulnerability

Solution:
Upgrades are available:


bzip2 bzip2 0.9 c

bzip2 bzip2 0.9 b

bzip2 bzip2 0.9

bzip2 bzip2 0.9 a

bzip2 bzip2 0.9.5 a

bzip2 bzip2 0.9.5 b

bzip2 bzip2 0.9.5 d

bzip2 bzip2 0.9.5 c

bzip2 bzip2 1.0

bzip2 bzip2 1.0.1

References

bzip2 Archive Inherited Symbolic Link Permissions Vulnerability

References:

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