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Secunia Research: libarchive "lha_read_file_header_1()" Out-Of-Bounds Memory Access Denial of Service Vulnerability



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                    Secunia Research 2017/01/27

					

  libarchive "lha_read_file_header_1()" Out-Of-Bounds Memory Access 

                  Denial of Service Vulnerability



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Table of Contents



Affected Software....................................................1

Severity.............................................................2

Description of Vulnerability.........................................3

Solution.............................................................4

Time Table...........................................................5

Credits..............................................................6

References...........................................................7

About Flexera Software...............................................8

Verification.........................................................9



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1) Affected Software



* libarchive version 3.2.2.

  Other versions may also be affected.



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2) Severity



Rating: Moderately critical

Impact: Denial of Service

Where:  From remote



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3) Description of Vulnerability



Secunia Research has discovered a vulnerability in libarchive, which

can be exploited by malicious people to cause a DoS (Denial of

Service).



The vulnerability is caused due to an error in the

"lha_read_file_header_1()" function

(archive_read_support_format_lha.c), which can be exploited to trigger

an out-of-bounds read memory access via a specially crafted archive.



The vulnerability is confirmed in version 3.2.2. Other versions may

also be affected.



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4) Solution



Fixed in the source code repository.

https://github.com/libarchive/libarchive/commit/

98dcbbf0bf4854bf987557e55e55fff7abbf3ea9



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5) Time Table



2016/12/20 - Initial contact to request security contact.

2016/12/27 - Maintainer responds with security contacts.

2016/12/29 - Maintainers provided with the vulnerability details.

2017/01/11 - Request for status after no response.

2017/01/16 - Maintainers acknowledge the vulnerability and publish a

             suggested fix in an unofficial source code repository.

2017/01/19 - Maintainers informed about the fixed released date of

             Secunia Advisory set to 2017/01/23 due to the public

             disclosure of the vulnerability.

2017/01/19 - Maintainers provide a patch in the official source

             code repository.

2017/01/23 - Release of Secunia Advisory SA74169.

2017/01/27 - Public disclosure of Secunia Research Advisory.

2017/01/30 - Added CVE identifier.



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6) Credits



Discovered by Jakub Jirasek, Secunia Research at Flexera Software.



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7) References



The Common Vulnerabilities and Exposures (CVE) project has assigned

the CVE-2017-5601 identifier for the vulnerability.



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8) About Flexera Software



Flexera Software helps application producers and enterprises increase

application usage and the value they derive from their software.



http://www.flexerasoftware.com/enterprise/company/about/



Flexera Software  delivers  market-leading  Software  Vulnerability

Management solutions enabling enterprises to proactively identify and

remediate software vulnerabilities, effectively reducing the risk of

costly security breaches.



http://www.flexerasoftware.com/enterprise/products/



Flexera  Software  supports  and  contributes  to  the community in

several ways.  We have always believed that reliable vulnerability

intelligence and tools to aid identifying and fixing vulnerabilities

should be  freely available  for  consumers  to ensure that users,

who care about their online privacy and security, can stay secure.

Only a few vendors address vulnerabilities in a proper way and help

users get updated  and  stay secure.  End-users (whether private

individuals or businesses) are otherwise left largely alone,  and

that is why back in 2002, Secunia Research started investigating,

coordinating  disclosure  and  verifying software vulnerabilities.

In  2016,  Secunia Research  became  a  part  of  Flexera Software

and today our in-house software vulnerability research remains the

core  of  the  Software  Vulnerability  Management  products  at

Flexera Software.



http://secunia.com/secunia_research/



The  public  Advisory database  contains sufficient information  for

researchers, security enthusiasts, and consumers to lookup individual

products and vulnerabilities  and  assess, whether they need to take

any actions to secure their systems or whether a given vulnerability

has already been discovered



http://secunia.com/advisories/



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9) Verification



Please verify this advisory by visiting the Secunia website:

http://secunia.com/secunia_research/2017-3/



Complete list of vulnerability reports published by Secunia Research:

http://secunia.com/secunia_research/



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