CVE-2020-6077

An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.

An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages, the implementation does not properly keep track of the available data in the message, possibly leading to an out-of-bounds read that would result in a denial of service. An attacker can send an mDNS message to trigger this vulnerability.

Multiple security issues were discovered in the microdns plugin of the VLC media player, which could result in denial of service or potentially the execution of arbitrary code via malicious mDNS packets (CVE-2020-6071, CVE-2020-6072, CVE-2020-6073, CVE-2020-6077, CVE-2020-6078, CVE-2020-6079, CVE-2020-6080).

VLC has been updated to 3.0.10 to fix theese and other issues.

It was discovered that libmicrodns could recursively follow the same compression pointer, leading to an infinite loop. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-6071)

It was discovered that libmicrodns did not check the return value of the rr_decode function, which could lead to a double free. An attacker could possibly use this issue to execute arbitrary code. (CVE-2020-6072)

It was discovered that libmicrodns incorrectly handled certain inputs, which could lead to an integer overflow. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-6073)

It was discovered that libmicrodns incorrectly handled certain inputs, which could lead to a out-of-bounds read. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-6077)

It was discovered that libmicrodns incorrectly handled memory when parsing mDNS messages in mdns_recv, which could lead to a NULL pointer dereference. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-6078)

It was discovered that libmicrodns incorrectly handled memory, which could lead to excessive memory consumption due to memory leaks. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-6079, CVE-2020-6080)