[ubuntu/hirsute-security] libxml2 2.9.10+dfsg-6.3ubuntu0.1 (Accepted)

[Avital Ostromich]

libxml2 (2.9.10+dfsg-6.3ubuntu0.1) hirsute-security; urgency=medium

  * SECURITY UPDATE: use-after-free in xmlEncodeEntitiesInternal
    - debian/patches/CVE-2021-3516.patch: Call htmlCtxtUseOptions to make sure
      that names aren't stored in dictionaries.
    - CVE-2021-3516
  * SECURITY UPDATE: heap-based buffer overflow in xmlEncodeEntitiesInternal 
    - debian/patches/CVE-2021-3517.patch: Add some checks to validate input is
      UTF-8 format, supplementing CVE-2020-24977 fix.
    - CVE-2021-3517
  * SECURITY UPDATE: use-after-free in xmlXIncludeDoProcess 
    - debian/patches/CVE-2021-3518.patch: Move from a block list to an allow
      list approach to avoid descending into other node types that can't
      contain elements.
    - CVE-2021-3518
  * SECURITY UPDATE: NULL pointer dereference in xmlValidBuildAContentModel
    - debian/patches/CVE-2021-3537.patch: Check return value of recursive calls
      to xmlParseElementChildrenContentDeclPriv and return immediately in case
      of errors.
    - CVE-2021-3537
  * SECURITY UPDATE: Exponential entity expansion 
    - debian/patches/Patch-for-security-issue-CVE-2021-3541.patch: Add check to
      xmlParserEntityCheck to prevent entity exponential.
    - CVE-2021-3541

Date: 2021-05-27 19:47:23.522578+00:00
Changed-By: Avital Ostromich <avital.ostromich at canonical.com>
https://launchpad.net/ubuntu/+source/libxml2/2.9.10+dfsg-6.3ubuntu0.1
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