CVE-2018-17456

high

Published — · Modified —

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CVSS v3

—

CVSS v4 NEW

—

not yet in upstream

VIR risk

9.0

Description

Git before 2.14.5, 2.15.x before 2.15.3, 2.16.x before 2.16.5, 2.17.x before 2.17.2, 2.18.x before 2.18.1, and 2.19.x before 2.19.1 allows remote code execution during processing of a recursive "git clone" of a superproject if a .gitmodules file has a URL field beginning with a '-' character.

Predictions

Exploit likelihood

20%

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-45631 local linux

joernchen · 2018-10-16

Git Submodule - Arbitrary Code Execution

Source code queued for fetch — refresh in a moment.

EDB-45548 local linux

Junio C Hamano · 2018-10-05

Git Submodule - Arbitrary Code Execution (PoC)

Source code queued for fetch — refresh in a moment.

Metasploit modules

exploit_multi/http/git_submodule_url_exec rank 600

Malicious Git HTTP Server For CVE-2018-17456

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	`2.19.1-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`1:2.19.1-1`
sid	Fixed	`1:2.19.1-1`
forky	Fixed	`1:2.19.1-1`
bullseye	Fixed	`1:2.19.1-1`
bookworm	Fixed	`1:2.19.1-1`

References

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

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