CVE-2019-5736

high

Published 2019-05-07 · Modified 2019-05-07

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CVSS v3

—

CVSS v4 NEW

—

not yet in upstream

VIR risk

9.0

Description

RHSA-2019:0975: container-tools:rhel8 security and bug fix update (Important)

Predictions

Exploit likelihood

55%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-46359 local linux text · 1 KB

feexd · 2019-02-12

runc < 1.0-rc6 (Docker < 18.09.2) - Container Breakout (1)

text exploit Source: Exploit-DB

# Usage
Edit HOST inside `payload.c`, compile with `make`. Start `nc` and run `pwn.sh` inside the container.

# Notes
- This exploit is destructive: it'll overwrite `/usr/bin/docker-runc` binary *on the host* with the
payload. It'll also overwrite `/bin/sh` inside the container.
- Tested only on Debian 9.
- No attempts were made to make it stable or reliable, it's only tested to work when a `docker exec
<id> /bin/sh` is issued on the host.

More complete explanation [here](https://github.com/lxc/lxc/commit/6400238d08cdf1ca20d49bafb85f4e224348bf9d).

Download: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/46359.zip

EDB-46369 local linux

embargo · 2019-02-13

runc < 1.0-rc6 (Docker < 18.09.2) - Container Breakout (2)

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_linux/local/docker_runc_escape rank

Docker Container Escape Via runC Overwrite

Source fetch failed: fetch_error — view the original via the link above.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`1:18.09.2-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`1:3.1.0+really3.0.3-4`
sid	Fixed	`1:3.1.0+really3.0.3-4`
forky	Fixed	`1:3.1.0+really3.0.3-4`
bullseye	Fixed	`1:3.1.0+really3.0.3-4`
bookworm	Fixed	`1:3.1.0+really3.0.3-4`

Red Hat Fixed 1 release

Version	Status	Fixed in
8	Fixed	—

Rocky Linux Fixed 1 release

Version	Status	Fixed in
8	Fixed	—

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.