CVE-2020-13802: Rebar3 versions 3.0.0-beta.3 to 3.13.2 are vulnerable to OS command injection via URL parameter of dependency specification.

PriorityP262critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

6.75%

93.8th percentile

Rebar3 versions 3.0.0-beta.3 to 3.13.2 are vulnerable to OS command injection via URL parameter of dependency specification.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
debian	rebar3	—	—
erlang	rebar3	—	—
erlang	rebar3	3.1.0 – 3.13.2	—

Detection & IOCsextracted from sources · hover to see the quote

→CVE-2020-13802 affects Rebar3 versions 3.0.0-beta.3 through 3.13.2; OS command injection is triggered via the URL parameter of a dependency specification in rebar.config or equivalent dependency declarations. ↗
→The vulnerability allows remote code execution through the Erlang rebar3 build tool; monitor for unexpected process spawning from rebar3 during dependency resolution/fetching. ↗
→Review the upstream fix in GitHub PR #2302 to understand the sanitization applied to URL parameters; use this to craft detection logic for unsanitized shell-metacharacter sequences in dependency URLs. ↗

·The injection vector is specifically the URL parameter within a dependency specification (e.g., in rebar.config); only dependency entries using a URL field are exploitable, not all rebar3 usage. ↗
·Scope is listed as local in the Debian security tracker, meaning exploitation requires the ability to influence the rebar3 dependency configuration (e.g., a malicious rebar.config or dependency URL). ↗

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.010.0CRITICALAV:N/AC:L/Au:N/C:C/I:C/A:C

osv9.8CRITICAL

vendor_debian9.8LOW

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.