VAR-200212-0651
Vulnerability from variot - Updated: 2023-12-18 12:47Buffer overflow in the get_origin function in traceroute-nanog allows attackers to execute arbitrary code via long WHOIS responses. A vulnerability has been discovered in Traceroute-nanog. It has been reported that Traceroute-nanog contains a buffer overflow condition. The overflow occurs in the 'get_origin()' function in the 'traceroute.c' file. Due to insufficient bounds checking performed by the whois parser, it may be possible to cause 'get_origin()' to corrupt memory on the system stack. This vulnerability can be exploited by an attacker to gain root privileges on a target host. Traceroute-nanog is an open source routing tracking information search program, which can perform DNS resolution on each hop, and obtain information such as the administrator's EMAIL address. The \'\'traceroute.c\'\' file in Traceroute-nanog's \'\'get_origin()\'\' function lacks proper bounds buffer checking, a local attacker can exploit this vulnerability for heap-based buffering Area overflow, careful construction of submitted data can obtain root user privileges. \'\'traceroute.c\'\' When the get_origin() function is called in the file, its stack status is as follows: char buf[256] tmp4[100] tmp3[100] tmp2[100] tmp1[100] EBP EIP [bbbbbbbbbbbbbbbbb44444444433333333332222222222111111111BBBBIIII] -> 0xbfffffff There is an 8K buffer named \'\'reply\'\' in the heap, which is used to store the response from the server. Through continuous read(2) calls, 256 The byte data is read into the buf[] array and connected to the \'\'reply[]\'\' buffer, but there is no sufficient boundary check when writing the buffer, and it is parsed by the get_origin() function When a buffer overflow is triggered, carefully constructed and submitted data can execute arbitrary instructions on the system with ROOT privileges
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