Lhaca Extended Header Size buffer overflow

lhaca-extendedheadersize-bo (35297)

High Risk

Description:

Lhaca is vulnerable to a stack-based buffer overflow. By persuading a victim to open a specially-crafted .LZH archive containing an "Extended Header Size" value greater than 255 bytes, a remote attacker could overflow a buffer and execute arbitrary code on the system with elevated privileges or cause the application to crash.

*CVSS:

Base Score:	5.6
Access Vector:	Remote
Access Complexity:	High
Authentication:	Not Required
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	4.1
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Lhaca (1.23 or later), available from the Lhaca Web site. See References.

References:

• Lhaca Web site: Lhaca.
• vuln.sg Vulnerability Research Advisory 2007-07-01: Lhaca LHA Extended Header Handling Buffer Overflow Vulnerability.
• CVE-2007-3512: Stack-based buffer overflow in Lhaca File Archiver before 1.22 allows user-assisted remote attackers to execute arbitrary code via a large LHA Extended Header Size value in an LZH archive, a different issue than CVE-2007-3375.
• SA25797: Lhaca LZH Archive Processing Buffer Overflow Vulnerability
• VUPEN/ADV-2007-2399: Lhaca LZH Archive Extended Header Size Processing Buffer Overflow Vulnerability

Platforms Affected:

• Lhaca Lhaca prior to 1.22

Reported:

Jun 25, 2007

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