Debian DLA-2972-1 : libxml2 - LTS security update


The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2972 advisory. - libxml2 2.9.4 and earlier, as used in XMLSec 1.2.23 and earlier and other products, does not offer a flag directly indicating that the current document may be read but other files may not be opened, which makes it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document. (CVE-2016-9318) - parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities. (CVE-2017-16932) - An integer overflow in xmlmemory.c in libxml2 before 2.9.5, as used in Google Chrome prior to 62.0.3202.62 and other products, allowed a remote attacker to potentially exploit heap corruption via a crafted XML file. (CVE-2017-5130) - ** DISPUTED ** libxml2 2.9.4, when used in recover mode, allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted XML document. NOTE: The maintainer states I would disagree of a CVE with the Recover parsing option which should only be used for manual recovery at least for XML parser. (CVE-2017-5969) - valid.c in libxml2 before 2.9.13 has a use-after-free of ID and IDREF attributes. (CVE-2022-23308) Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.