eml_parser: DoS via deeply nested parens in Received headers
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| GOVCERT-LU | eml_parser | affected |
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| Vendor | Product | Versions | ||||||||
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| Govcert-lu | Eml Parser |
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| Source | ID | Title |
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Github GHSA |
GHSA-g7gc-gmgp-wgqg | eml_parser vulnerable to DoS via deeply nested parens in Received headers |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.630% probability within 30 days)
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Govcert-lu
Govcert-lu eml Parser |
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| Vendors & Products |
Govcert-lu
Govcert-lu eml Parser |
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| Description | eml_parser serves as a python module for parsing eml files and returning various information found in the e-mail as well as computed information. Prior to 3.0.2, eml_parser.routing.noparenthesis in eml_parser/routing.py removes parenthesized CFWS comments from Received: headers with a regex-based fix-point loop whose running time is quadratic in the nesting depth. A single Received: header with 5,000 nested parentheses causes approximately 1.3 seconds of CPU saturation per parsed message, and doubling the nesting depth approximately quadruples the running time. An attacker can submit relatively small EML files that consume multiple seconds of processing time, causing worker latency, queue backpressure, and possible service-level outages in synchronous gateways, sandboxes, and real-time triage pipelines. This issue is fixed in version 3.0.2. | |
| Title | eml_parser: DoS via deeply nested parens in Received headers | |
| Weaknesses | CWE-1124 CWE-770 |
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| References |
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| Metrics |
cvssV3_1
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