|
 |
|
gzip Multiple Vulnerabilities
|
|
|
|
|
Secunia Advisory:
|
SA21996
|
|
|
Release Date:
|
2006-09-20
|
|
|
Critical:
|
Moderately critical
|
|
Impact:
|
DoS
System access
|
|
Where:
|
From remote
|
|
Solution Status:
|
Unpatched
|
|
| Software: | gzip 1.x
|
| | CVE reference: | CVE-2006-4334 (Secunia mirror)
CVE-2006-4335 (Secunia mirror)
CVE-2006-4336 (Secunia mirror)
CVE-2006-4337 (Secunia mirror)
CVE-2006-4338 (Secunia mirror)
|
|
|
This advisory is currently marked as unpatched!
- Companies can be alerted when a patch is released! |
|
|
Description:
Tavis Ormandy has reported some vulnerabilities in gzip, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
1) A boundary error within the "make_table()" function in unlzh.c can be used to modify certain stack data. This can be exploited to cause a DoS and potentially allows to execute arbitrary code by e.g. tricking a user or automated system into unpacking a specially crafted archive file.
2) A buffer underflow exists within the "build_tree()" function in unpack.c, which can be exploited to cause a DoS and potentially allows to execute arbitrary code by e.g. tricking a user or automated system into unpacking a specially crafted "pack" archive file.
3) A buffer overflow within the "make_table()" function of gzip's LZH support can be exploited to cause a DoS and potentially to compromise a vulnerable system by e.g. tricking a user or automated system into unpacking an archive containing a specially crafted decoding table.
4) A NULL pointer dereference within the "huft_build()" function and an infinite loop within the LZH handling can be exploited to cause a DoS by e.g. tricking a user or automated system into unpacking a specially crafted archive file.
The vulnerabilities have been reported in version 1.3.5. Other versions may also be affected.
Solution:
Do not unpack untrusted archive files.
Provided and/or discovered by:
Tavis Ormandy, Google Security Team
Original Advisory:
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=204676
Other References:
US-CERT VU#554780:
http://www.kb.cert.org/vuls/id/554780
US-CERT VU#381508:
http://www.kb.cert.org/vuls/id/381508
US-CERT VU#773548:
http://www.kb.cert.org/vuls/id/773548
US-CERT VU#933712:
http://www.kb.cert.org/vuls/id/933712
US-CERT VU#596848
http://www.kb.cert.org/vuls/id/596848
|
|
|
|
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
|
|
|
2 Related Secunia Security Advisories
|
|
|
1. gzip Directory Traversal Vulnerability
|
|
2. gzip Various Scripts Insecure Temporary File Creation
|
|
|
Send Feedback to Secunia
|
|
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
|
|
|
|
|
|
Secunia PSI
Scan | Patch | Track
Free Download
|
|
|
Secunia Poll
|
|
|
|
|
 |
|
|
Most Popular Advisories
|
|
|
|
|
|
