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Secunia Security Advisory 51156

Secunia Security Advisory 51156
Posted Nov 8, 2012
Authored by Secunia | Site secunia.com

Secunia Security Advisory - Tavis Ormandy has reported multiple vulnerabilities in Sophos Anti-Virus, which can be exploited by malicious, local users to gain escalated privileges and by malicious people to conduct cross-site scripting attacks and compromise a user's system.

tags | advisory, local, vulnerability, virus, xss
MD5 | f520f92e7e9f18b3ee2e64f4ee6ddcbe

Secunia Security Advisory 51156

Change Mirror Download
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The final version of the CSI 6.0 has been released.
Find out why this is not just another Patch Management solution: http://secunia.com/blog/325/

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TITLE:
Sophos Anti-Virus Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA51156

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/51156/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=51156

RELEASE DATE:
2012-11-07

DISCUSS ADVISORY:
http://secunia.com/advisories/51156/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)

http://secunia.com/advisories/51156/

ONLY AVAILABLE IN CUSTOMER AREA:
* Authentication Level
* Report Reliability
* Secunia PoC
* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=51156

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Tavis Ormandy has reported multiple vulnerabilities in Sophos
Anti-Virus, which can be exploited by malicious, local users to gain
escalated privileges and by malicious people to conduct cross-site
scripting attacks and compromise a user's system.

1) An integer overflow error when scanning a Visual Basic 6 compiled
file can be exploited to cause a heap-based buffer overflow.

2) Certain input is not properly sanitised within the Layered Service
Provider (LSP) block page before being returned to the user. This can
be exploited to execute arbitrary HTML and script code in a user's
browser session in context of an affected site.

3) An error when checking a compression algorithm within the
"CFFolder" structure can be exploited to cause a buffer overflow via
a specially crafted CAB archive.

4) An error within the VM_STANDARD byte-code opcode can be exploited
to corrupt memory via a specially crafted RAR archive.

5) An error due to the application setting insecure file system
permissions on the network update service directory can be exploited
to create update modules (e.g. DLL libraries), which will execute
with SYSTEM privileges.

6) An error when decrypting PDF revision 3 documents during scanning
can be exploited to cause a stack-based buffer overflow via a
specially crafted file.

Successful exploitation of vulnerabilities #1, #3, #4, and #6 may
allow execution of arbitrary code.

Please see the vendor's advisory for a list of affected versions.

SOLUTION:
Apply updates.

PROVIDED AND/OR DISCOVERED BY:
Tavis Ormandy

ORIGINAL ADVISORY:
Sophos:
http://www.sophos.com/en-us/support/knowledgebase/118424.aspx

Tavis Ormandy:
http://seclists.org/fulldisclosure/2012/Nov/31
https://lock.cmpxchg8b.com/sophailv2.pdf

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

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