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CVE-2021-3517

Description

There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application. #### Bugs * <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=987738> #### Notes Author| Note ---|--- [ccdm94](<https://launchpad.net/~ccdm94>) | same patch as the one for CVE-2020-24977. As per a comment made by upstream in issue 235 (related to this CVE) both the issues fixed by bf22713507 are caused by the same underlying problem.


Affected Package


OS OS Version Package Name Package Version
ubuntu 20.04 libxml2 2.9.10+dfsg-5ubuntu0.20.04.1
ubuntu 20.10 libxml2 2.9.10+dfsg-5ubuntu0.20.10.2
ubuntu 21.04 libxml2 2.9.10+dfsg-6.3ubuntu0.1
ubuntu 12.04 libxml2 any
ubuntu 14.04 libxml2 2.9.1+dfsg1-3ubuntu4.13+esm2
ubuntu upstream libxml2 2.9.10+dfsg-6.6, 2.9.11
ubuntu 16.04 libxml2 2.9.3+dfsg1-1ubuntu0.7+esm1

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