Title: abctab2ps Trim_Title Function ABC File Remote Buffer Overflow Vulnerability
Severity: HIGH
Description:
abctab2ps is a music and tablature typesetting program. It converts ABC format files to postscript.
abctab2ps is reported prone to a remote buffer overflow vulnerability. This issue arises because the application fails to carry out proper boundary checks before copying user-supplied data in to sensitive process buffers. It is reported that this issue can allow an attacker to gain unauthorized access to a computer in the context of the application.
The vulnerability exists in the 'trim_title()' function of 'parse.cpp' file. This function copies user-supplied data from an ABC file processed by the application to finite-sized buffers of 301 and 81 bytes. Due to the lack of restrictions on the size of a user-supplied string, the 'str[]' and 'rest' arrays can be overflowed.
An attacker can exploit this issue by crafting a malicious ABC file that contains excessive string data, replacement memory addresses, and executable instructions to trigger this issue.
If a user obtains this file and processes it through the application, the attacker-supplied instructions may be executed on the vulnerable computer. It is reported that successful exploitation may result in a compromise in the context of the application.
abctab2ps version 1.6.3 is reported prone to this vulnerability. It is likely that other versions are affected as well.
Affected Products:
- abctab2ps abctab2ps 1.6.3
References:
- "D. J. Bernstein" <djb@cr.yp.to>: [remote] [control] abctab2ps 1.6.3
- abctab2ps: abctab2ps Home Page
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