xar Package Signature Validation Remote Security Bypass Vulnerability

BID:39292

Info

xar Package Signature Validation Remote Security Bypass Vulnerability

Bugtraq ID: 39292
Class: Design Error
CVE: CVE-2010-0055
Remote: Yes
Local: No
Published: Mar 29 2010 12:00AM
Updated: Apr 13 2015 10:24PM
Credit: Braden Thomas of the Apple Security Team
Vulnerable: xar xar 1.5.2
Debian Linux 5.0 sparc
Debian Linux 5.0 s/390
Debian Linux 5.0 powerpc
Debian Linux 5.0 mipsel
Debian Linux 5.0 mips
Debian Linux 5.0 m68k
Debian Linux 5.0 ia-64
Debian Linux 5.0 ia-32
Debian Linux 5.0 hppa
Debian Linux 5.0 armel
Debian Linux 5.0 arm
Debian Linux 5.0 amd64
Debian Linux 5.0 alpha
Debian Linux 5.0
Apple Mac OS X Server 10.5.8
Apple Mac OS X Server 10.5.7
Apple Mac OS X Server 10.5.6
Apple Mac OS X Server 10.5.5
Apple Mac OS X Server 10.5.4
Apple Mac OS X Server 10.5.3
Apple Mac OS X Server 10.5.2
Apple Mac OS X Server 10.5.1
Apple Mac OS X Server 10.5
Apple Mac OS X 10.5.8
Apple Mac OS X 10.5.7
Apple Mac OS X 10.5.6
Apple Mac OS X 10.5.5
Apple Mac OS X 10.5.4
Apple Mac OS X 10.5.3
Apple Mac OS X 10.5.2
Apple Mac OS X 10.5.1
Apple Mac OS X 10.5
Not Vulnerable: xar xar 1.5.3

Discussion

xar Package Signature Validation Remote Security Bypass Vulnerability

xar (eXtensible ARchiver) is prone to a security-bypass vulnerability because it fails to properly verify signatures in a modified xar archive.

Attackers can exploit this issue to make modified archives appear to have a valid signature. This may lead to other attacks.

Versions prior to xar 1.5.3 are vulnerable.

NOTE: This issue was previously covered in BID 39020 (Apple Mac OS X APPLE-SA-2010-03-29-1 Multiple Security Vulnerabilities) but has been assigned its own record to better document it.

Exploit / POC

xar Package Signature Validation Remote Security Bypass Vulnerability

Attackers can use readily available utilities to exploit this issue.

Solution / Fix

xar Package Signature Validation Remote Security Bypass Vulnerability

Solution:
Updates are available. Please see the references for details.


Apple Mac OS X Server 10.5

Apple Mac OS X 10.5

Apple Mac OS X 10.5.1

Apple Mac OS X Server 10.5.1

Apple Mac OS X 10.5.2

Apple Mac OS X Server 10.5.2

Apple Mac OS X 10.5.3

Apple Mac OS X Server 10.5.3

Apple Mac OS X 10.5.4

Apple Mac OS X Server 10.5.4

Apple Mac OS X Server 10.5.5

Apple Mac OS X 10.5.5

Apple Mac OS X 10.5.6

Apple Mac OS X Server 10.5.6

Apple Mac OS X Server 10.5.7

Apple Mac OS X 10.5.7

Apple Mac OS X Server 10.5.8

Apple Mac OS X 10.5.8

References

xar Package Signature Validation Remote Security Bypass Vulnerability

References:
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