CVE-2017-15650
HighSummary
Musl libc before 1.1.17 has a buffer overflow vulnerability that can be exploited via crafted DNS replies. The dns_parse_callback function in network/lookup_name.c does not restrict the number of addresses, allowing an attacker to send an unexpected number of A records in response to an AAAA query.
Risk Assessment
Exploitation of this vulnerability may lead to remote code execution or system crashes, posing a serious threat to the stability and security of applications using musl libc.
Recommendation
It is recommended to update musl libc to version 1.1.17 or later to mitigate this vulnerability and to implement additional security measures against unauthorized DNS replies.
Other vulnerabilities in musl libc
See all- CVE-2026-6042Medium
A security flaw has been discovered in musl libc up to 1.2.6. Affected is the function iconv of the file src/locale/iconv.c of the component GB18030 4-byte Decoder. Performing a manipulation results in inefficient algorithmic complexity. The attack must be initiated from a local position.
- CVE-2025-26519High
musl libc 0.9.13 through 1.2.5 before 1.2.6 has an out-of-bounds write vulnerability when an attacker can trigger iconv conversion of untrusted EUC-KR text to UTF-8.
- CVE-2015-1817Critical
A stack-based buffer overflow in the inet_pton function in musl libc allows attackers to exploit unspecified impacts. This affects versions from 0.9.15 to 1.0.4 and from 1.1.0 to 1.1.7.
Original NVD description (English source)
musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in network/lookup_name.c does not restrict the number of addresses, and thus an attacker can provide an unexpected number by sending A records in a reply to an AAAA query.