Description Quality Assurance 2020-05-04 09:16:03 CEST

New Debian vlc 3.0.10-0+deb9u1 fixes:
This update addresses the following issues:
* An exploitable denial-of-service vulnerability exists in the resource  record-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing  compressed labels in mDNS messages, the compression pointer is followed  without checking for recursion, leading to a denial of service. An attacker  can send an mDNS message to trigger this vulnerability. (CVE-2020-6071)
* An exploitable code execution vulnerability exists in the label-parsing  functionality of Videolabs libmicrodns 0.1.0. When parsing compressed  labels in mDNS messages, the rr_decode function's return value is not  checked, leading to a double free that could be exploited to execute  arbitrary code. An attacker can send an mDNS message to trigger this  vulnerability. (CVE-2020-6072)
* An exploitable denial-of-service vulnerability exists in the TXT  record-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing  the RDATA section in a TXT record in mDNS messages, multiple integer  overflows can be triggered, leading to a denial of service. An attacker can  send an mDNS message to trigger this vulnerability. (CVE-2020-6073)
* 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. (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 in mdns_recv, the return value of the mdns_read_header  function is not checked, leading to an uninitialized variable usage that  eventually results in a null pointer dereference, leading to service crash.  An attacker can send a series of mDNS messages to trigger this  vulnerability. (CVE-2020-6078)
* An exploitable denial-of-service vulnerability exists in the resource  allocation handling of Videolabs libmicrodns 0.1.0. When encountering  errors while parsing mDNS messages, some allocated data is not freed,  possibly leading to a denial-of-service condition via resource exhaustion.  An attacker can send one mDNS message repeatedly to trigger this  vulnerability through decoding of the domain name performed by rr_decode.  (CVE-2020-6079)
* An exploitable denial-of-service vulnerability exists in the resource  allocation handling of Videolabs libmicrodns 0.1.0. When encountering  errors while parsing mDNS messages, some allocated data is not freed,  possibly leading to a denial-of-service condition via resource exhaustion.  An attacker can send one mDNS message repeatedly to trigger this  vulnerability through the function rr_read_RR [5] reads the current  resource record, except for the RDATA section. This is read by the loop at  in rr_read. For each RR type, a different function is called. When the RR  type is 0x10, the function rr_read_TXT is called at [6]. (CVE-2020-6080)