LSH Error Checking Heap Overflow Vulnerability - Secunia Advisories - Vulnerability Intelligence

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LSH Error Checking Heap Overflow Vulnerability
Secunia Advisory:	SA9805	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2003-09-22
Popularity:	6,827 views

Critical:	Highly critical
Impact:	System access
Where:	From remote
Solution Status:	Vendor Patch

Software:	LSH 1.x

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2003-0826

Description: A vulnerability has been identified in LSH, which can be exploited by malicious people to compromise a vulnerable system. The vulnerability is caused due to a boundary error in "read_line.c" when checking for errors. This can be exploited to cause a heap overflow by sending an overly long, specially crafted string. Successful exploitation allows execution of arbitrary code on the vulnerable system and doesn't require user authentication. An exploit has been published. NOTE: Reportedly, similar bugs were also identified in the check for channel number allocation and in the experimental client SRP code. Solution: Apply patch for 1.4.2, or update to version 1.4.3 or 1.5.3. Version 1.4.3: http://www.lysator.liu.se/~nisse/archive/lsh-1.4.3.tar.gz ftp://ftp.lysator.liu.se/pub/security/lsh/lsh-1.4.3.tar.gz Version 1.5.3: http://www.lysator.liu.se/~nisse/archive/lsh-1.5.3.tar.gz ftp://ftp.lysator.liu.se/pub/security/lsh/lsh-1.5.3.tar.gz Patch for 1.4.2: http://www.lysator.liu.se/~nisse/archive/lsh-1.4.2-1.4.3.diff.gz ftp://ftp.lysator.liu.se/pub/security/lsh/lsh-1.4.2-1.4.3.diff.gz Provided and/or discovered by: Bennett Todd Original Advisory: http://lists.lysator.liu.se/pipermail/lsh-bugs/2003q3/000127.html

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