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    CVE-2019-10773

    In Yarn before 1.21.1, the package install functionality can be abused to generate arbitrary symlinks on the host filesystem by using specially crafted "bin" keys. Existing files could be overwritten depending on the current user permission set.

    Published:Dec 16, 2019
    Last Modified:Nov 21, 2024
    EPS:Dec 16, 2019
    EPSS Score:0.00571
    CVSS Score:7.8

    Affected Products

    Vendor
    Redhat
    Product
    Quay
    Vendor
    Yarnpkg
    Product
    Yarn

    Exploits

    https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-104 Cross Zone Scripting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-132 Symlink Attack
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-153 Input Data Manipulation
    CAPEC-17 Using Malicious Files
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-35 Leverage Executable Code in Non-Executable Files
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-588 DOM-Based XSS
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-74244 (CVSS 5.9) — A flaw was found in Red Hat Quay's Stripe billing webhook handler. This vulnerability allows an unauthenticate…
    CVE-2026-74243 (CVSS 6.5) — A flaw was found in Red Hat Quay. When the SECURITY_SCANNER_V4_PSK (pre-shared key) is not set, a remote unaut…
    CVE-2026-74241 (CVSS 4.8) — A flaw was found in Red Hat Quay's external Lightweight Directory Access Protocol (LDAP) authentication handli…
    CVE-2026-74242 (CVSS 5.3) — A flaw was found in Red Hat Quay. An administrator of any repository, by knowing or guessing a target notifica…
    CVE-2026-74245 (CVSS 5.9) — A flaw was found in Red Hat Quay's exported logs feature. An unauthenticated attacker with a valid file ID cou…
    CVE-2026-74240 (CVSS 5.4) — A flaw was found in Red Hat Quay's JWT (JSON Web Token) validation for federated robot accounts and single sig…
    CVE-2026-74247 (CVSS 4.2) — A flaw was found in Red Hat Quay. A user with FEATURE_BUILD_SUPPORT enabled and repository write access can ex…
    CVE-2026-19730 (CVSS 4.2) — The 'podman quadlet install --replace' command opens the existing destination file with O_CREATE|O_WRONLY but …
    CVE-2026-19519 (CVSS 4.3) — A flaw was found in claircore's RPM package scanner. Crafted RPM header data in a container layer can cause an…
    CVE-2026-18255 (CVSS 7.2) — A flaw was found in Quay. A user configured in GLOBAL_READONLY_SUPER_USERS is able to view robot account token…

    References

    https://access.redhat.com/errata/RHSA-2020:0475
    https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/
    https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7
    https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITY5BC63CCC647DFNUQRQ5AJDKUKUNBI/
    https://snyk.io/vuln/SNYK-JS-YARN-537806%2C
    https://access.redhat.com/errata/RHSA-2020:0475
    https://blog.daniel-ruf.de/critical-design-flaw-npm-pnpm-yarn/
    https://github.com/yarnpkg/yarn/commit/039bafd74b7b1a88a53a54f8fa6fa872615e90e7
    https://github.com/yarnpkg/yarn/issues/7761#issuecomment-565493023
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HIZW4NZVV5QY5WWGW2JRP3FHYKZ6ZJ5/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITY5BC63CCC647DFNUQRQ5AJDKUKUNBI/
    https://snyk.io/vuln/SNYK-JS-YARN-537806%2C

    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