Dnsmasq 缓冲区错误漏洞

dnsmasq is a lightweight DNS forwarding and DHCP and TFTP server written in C. It can be used as a server to forward DNS, DHCP, and TFTP. Dnsmasq 2.86 suffers from a buffer error vulnerability that stems from a heap-based buffer overflow in extractname called from answerauth and FuzzAuth...

Vulnerability of the extract_name() function (rfc1035.c): The Dnsmasq DNS server has a vulnerability related to the failure of operations beyond the buffer in memory, allowing an attacker to cause a service failure.

The vulnerability of the extractname function rfc1035.c in the Dnsmasq DNS server is related to the lack of length checking on input data. Exploiting this vulnerability allows a remote attacker to cause a service failure...

Vulnerability of the extract_name() function (rfc1035.c): The Dnsmasq DNS server has a vulnerability related to the failure of operations beyond the buffer in memory, allowing an attacker to cause a service failure.

The vulnerability of the extractname function rfc1035.c in the Dnsmasq DNS server is related to the lack of length checking on input data. Exploiting this vulnerability could allow a remote attacker to cause a service failure...

PT-2021-7713 · Dnsmasq +2 · Dnsmasq +2

Name of the Vulnerable Software and Affected Versions: Dnsmasq affected versions not specified Description: The issue is related to a buffer overflow in the extract name function of the fuzz util.c component of the Dnsmasq DNS server. This could allow a remote attacker to access confidential data...

PT-2021-7716 · Dnsmasq +2 · Dnsmasq +2

Name of the Vulnerable Software and Affected Versions: Dnsmasq affected versions not specified Description: The issue is related to a buffer overflow in the extract name function of the Dnsmasq DNS server. This could allow a remote attacker to access confidential data, compromise its integrity, a...

Vulnerability of the extract_name() function (rfc1035.c): The DNS server dnsmasq has a vulnerability related to buffer overflow in dynamic memory, allowing an attacker to execute arbitrary code.

The vulnerability of the extractname function rfc1035.c in the dnsmasq DNS server is related to buffer overflow in dynamic memory. Exploiting this vulnerability could allow a remote attacker to execute arbitrary code...

A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network who can create valid DNS replies could use this flaw to cause an overflow with arbitrary data in a heap-allocated memory possibly executing code on the machine. The flaw is in the rfc1035.c:extract_name() function which writes data to the memory pointed by name assuming MAXDNAME*2 bytes are available in the buffer. However in some code execution paths it is possible extract_name() gets passed an offset from the base buffer thus reducing in practice the number of available bytes that can be written in the buffer. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

...

A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker who can create valid DNS replies could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name() which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq resulting in a denial of service. The highest threat from this vulnerability is to system availability.

...

DEBIAN-CVE-2020-25682

A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network, who can create valid DNS replies, could use this flaw to cause an overflow with arbitrary...

ALPINE-CVE-2020-25682

A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network, who can create valid DNS replies, could use this flaw to cause an overflow with arbitrary...

dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled

A flaw was found in dnsmasq. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. This flaw allows a remote attacker, who can create valid DNS replies, to cause an overflow in a heap-allocated memory. This flaw is caused b...

dnsmasq: buffer overflow in extract_name() due to missing length check when DNSSEC is enabled

A flaw was found in dnsmasq. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network, who can create valid DNS replies, could use this flaw to cause an overflow with arbitrary data in a...

dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled

A flaw was found in dnsmasq. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is cause...

dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled

A flaw was found in dnsmasq. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. This flaw allows a remote attacker, who can create valid DNS replies, to cause an overflow in a heap-allocated memory. This flaw is caused b...

dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled

A flaw was found in dnsmasq. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. This flaw allows a remote attacker, who can create valid DNS replies, to cause an overflow in a heap-allocated memory. This flaw is caused b...

dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled

A flaw was found in dnsmasq. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is cause...

UBUNTU-CVE-2020-25682

A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network, who can create valid DNS replies, could use this flaw to cause an overflow with arbitrary...