| id: GO-2022-1039 |
| modules: |
| - module: std |
| versions: |
| - fixed: 1.18.7 |
| - introduced: 1.19.0-0 |
| fixed: 1.19.2 |
| vulnerable_at: 1.19.1 |
| packages: |
| - package: regexp/syntax |
| symbols: |
| - parser.push |
| - parser.repeat |
| - parser.factor |
| - parse |
| derived_symbols: |
| - Parse |
| summary: Memory exhaustion when compiling regular expressions in regexp/syntax |
| description: |- |
| Programs which compile regular expressions from untrusted sources may be |
| vulnerable to memory exhaustion or denial of service. |
| |
| The parsed regexp representation is linear in the size of the input, but in some |
| cases the constant factor can be as high as 40,000, making relatively small |
| regexps consume much larger amounts of memory. |
| |
| After fix, each regexp being parsed is limited to a 256 MB memory footprint. |
| Regular expressions whose representation would use more space than that are |
| rejected. Normal use of regular expressions is unaffected. |
| credits: |
| - Adam Korczynski (ADA Logics) |
| - OSS-Fuzz |
| references: |
| - report: https://go.dev/issue/55949 |
| - fix: https://go.dev/cl/439356 |
| - web: https://groups.google.com/g/golang-announce/c/xtuG5faxtaU |
| cve_metadata: |
| id: CVE-2022-41715 |
| cwe: 'CWE 400: Uncontrolled Resource Consumption' |
