GHSA-xfhh-rx56-rxcr

    Dashboard / Vulnerabilities / GHSA-xfhh-rx56-rxcr

    GHSA-xfhh-rx56-rxcr

    Published: 2 Jul 2019Last Modified: 10 Sept 2026

    Summary: Path Traversal vulnerability that affects yard

    Details: ## Possible arbitrary path traversal and file access via `yard server` ### Impact A path traversal vulnerability was discovered in YARD <= 0.9.19 when using `yard server` to serve documentation. This bug would allow unsanitized HTTP requests to access arbitrary files on the machine of a yard server host under certain conditions. Thanks to CuongMX from Viettel Cyber Security for discovering this vulnerability. ### Patches Please upgrade to YARD v0.9.20 immediately if you are relying on yard server to host documentation in any untrusted environments. ### Workarounds For users who cannot upgrade, it is possible to perform path sanitization of HTTP requests at your webserver level. WEBrick, for example, can perform such sanitization by default (which you can use via `yard server -s webrick`), as can certain rules in your webserver configuration.

    References: https://github.com/lsegal/yard/security/advisories/GHSA-xfhh-rx56-rxcr, https://nvd.nist.gov/vuln/detail/CVE-2019-1020001, https://github.com/advisories/GHSA-xfhh-rx56-rxcr, https://lists.debian.org/debian-lts-announce/2024/03/msg00006.html

    Affected packages

    Package

    Name: yard

    Purl: pkg:gem/yard

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.9.20

    Affected versions

    0.2.0
    0.2.1
    0.2.2
    0.2.3
    0.2.3.2
    0.2.3.3
    0.2.3.4
    0.2.3.5

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High