kapsl Index
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bind9

3 tools · 1 release line

DNS lookup utilities from ISC BIND (dig, host, nslookup). Each tool carries its own sandbox boundary — they are not the same.

kapsl dig
kapsl host
kapsl nslookup
Source ↗ Registry ↗

Release lines we maintain · the project decides these

findings shown are the whole project at that line

Tag Resolves to Lifecycle Updated Findings What the tag promises
  • stable — floats, carries security updates
  • unstable — tracks pre-releases, may break
  • eol — frozen, upstream is done

Tools in this project · pick one to inspect

capabilities differ between them

Tool Capabilities Seccomp Findings Image Description
showing dig host nslookup from bind9@latest → 9.20.24 stable

Findings

H3M1

identical on amd64, arm64 — one table describes both

CVE Sev CVSS Affects Description
CVE-2026-11979 ↗ H 7.8 libxml2 libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.
CVE-2026-13204 ↗ H 7.5 bind9 If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof.
CVE-2026-18798 ↗ H 7.5 openssl Issue summary: QUIC server may double free QRX (QUIC record layer RX) object when channel creation fails for initial packet.
CVE-2026-22185 ↗ M 4.6 lmdb OpenLDAP Lightning Memory-Mapped Database (LMDB) versions up to and including 0.9.14, prior to commit 8e1fda8, contain a heap buffer underflow in the readline() function of mdb_load.

1 further advisory matched this image and was assessed not to apply to it — see the VEX document for the reasoning and the evidence

CVE Affects Assessed
CVE-2026-27171 zlib not affected · vex

These are the findings of bind9, which ships every tool in this project. kapsl reports and gates; it never edits an image to clear a finding.

Composition

default nothing — stands alone
runtime none — self-contained
composes not used as a runtime

Some tools are only useful composed: a pip-installed CLI needs python as its runtime, bash pulls in coreutils. kapsl resolves that for you — -e git,python:flake8 composes explicitly.

Composition

default nothing — stands alone
runtime none — self-contained
composes not used as a runtime

Some tools are only useful composed: a pip-installed CLI needs python as its runtime, bash pulls in coreutils. kapsl resolves that for you — -e git,python:flake8 composes explicitly.

Composition

default nothing — stands alone
runtime none — self-contained
composes not used as a runtime

Some tools are only useful composed: a pip-installed CLI needs python as its runtime, bash pulls in coreutils. kapsl resolves that for you — -e git,python:flake8 composes explicitly.

Image

repository ghcr.io/kapsl-sh/bind9
platforms
size 18 MB unpacked · 1 layer
base scratch
signed cosign · · public key
last scan

Sandbox boundary

dig

capabilities

netro

Filled is granted to every invocation; the rest need --cap at the point of use.

seccomp tier

per tool

default

The syscall filter applied to this tool's entry point. Tools sharing an image do not share a tier.

dotfiles mapped in

read-only unless noted

  • ~/.digrc

env passed through

1 forwarded

IDN_DISABLE

Nothing else crosses in. No AWS_*, no SSH_AUTH_SOCK unless you ask.

env set by kapsl

none

none

per-subcommand

no overrides

Every invocation gets the same boundary. Where a tool needs more for one subcommand only, kapsl scopes it there rather than granting it everywhere.

Sandbox boundary

host

capabilities

netnomount

Filled is granted to every invocation; the rest need --cap at the point of use.

seccomp tier

per tool

default

The syscall filter applied to this tool's entry point. Tools sharing an image do not share a tier.

dotfiles mapped in

read-only unless noted

none

env passed through

1 forwarded

IDN_DISABLE

Nothing else crosses in. No AWS_*, no SSH_AUTH_SOCK unless you ask.

env set by kapsl

none

none

per-subcommand

no overrides

Every invocation gets the same boundary. Where a tool needs more for one subcommand only, kapsl scopes it there rather than granting it everywhere.

Sandbox boundary

nslookup

capabilities

netnomount

Filled is granted to every invocation; the rest need --cap at the point of use.

seccomp tier

per tool

default

The syscall filter applied to this tool's entry point. Tools sharing an image do not share a tier.

dotfiles mapped in

read-only unless noted

none

env passed through

1 forwarded

IDN_DISABLE

Nothing else crosses in. No AWS_*, no SSH_AUTH_SOCK unless you ask.

env set by kapsl

none

none

per-subcommand

no overrides

Every invocation gets the same boundary. Where a tool needs more for one subcommand only, kapsl scopes it there rather than granting it everywhere.

Provenance

sbom amd64 ↗ arm64 ↗
attestation amd64 ↗ arm64 ↗
scan report amd64 ↗ arm64 ↗ grype ·
vex amd64 ↗ arm64 ↗

Every image ships a full SBOM and a signed build attestation. Nothing here is a claim you have to take on trust.

4 findings across this project at latest. Counted once per advisory across every image the project builds.