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@cf-buildpacks-eng cf-buildpacks-eng released this 16 Aug 17:35
· 54 commits to main since this release
0.315.0
67c2812

Notably, this release addresses:

USN-5569-1 USN-5569-1: Unbound vulnerabilities:

  • CVE-2022-30699: NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.
  • CVE-2022-30698: NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation information by querying Unbound for a second level subdomain which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound checks the validity of parent delegation records before using cached delegation information.
-ii  libunbound2:amd64    1.6.7-1ubuntu2.4 amd64  library implementing DNS resolution and validation
+ii  libunbound2:amd64    1.6.7-1ubuntu2.5 amd64  library implementing DNS resolution and validation
-ii  linux-libc-dev:amd64 4.15.0-189.200   amd64  Linux Kernel Headers for development
+ii  linux-libc-dev:amd64 4.15.0-191.202   amd64  Linux Kernel Headers for development
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