CVE-2023-50262 (GCVE-0-2023-50262)
Vulnerability from cvelistv5 – Published: 2023-12-13 20:52 – Updated: 2024-08-02 22:16
VLAI?
Title
Dompdf possible DoS caused by infinite recursion when parsing SVG images
Summary
Dompdf is an HTML to PDF converter for PHP. When parsing SVG images Dompdf performs an initial validation to ensure that paths within the SVG are allowed. One of the validations is that the SVG document does not reference itself. However, prior to version 2.0.4, a recursive chained using two or more SVG documents is not correctly validated. Depending on the system configuration and attack pattern this could exhaust the memory available to the executing process and/or to the server itself.
php-svg-lib, when run in isolation, does not support SVG references for `image` elements. However, when used in combination with Dompdf, php-svg-lib will process SVG images referenced by an `image` element. Dompdf currently includes validation to prevent self-referential `image` references, but a chained reference is not checked. A malicious actor may thus trigger infinite recursion by chaining references between two or more SVG images.
When Dompdf parses a malicious payload, it will crash due after exceeding the allowed execution time or memory usage. An attacker sending multiple request to a system can potentially cause resource exhaustion to the point that the system is unable to handle incoming request.
Version 2.0.4 contains a fix for this issue.
Severity ?
5.3 (Medium)
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
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{
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"providerMetadata": {
"dateUpdated": "2024-08-02T22:16:46.642Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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"references": [
{
"name": "https://github.com/dompdf/dompdf/security/advisories/GHSA-3qx2-6f78-w2j2",
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://github.com/dompdf/dompdf/security/advisories/GHSA-3qx2-6f78-w2j2"
},
{
"name": "https://github.com/dompdf/dompdf/commit/41cbac16f3cf56affa49f06e8dae66d0eac2b593",
"tags": [
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"url": "https://github.com/dompdf/dompdf/commit/41cbac16f3cf56affa49f06e8dae66d0eac2b593"
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{
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"url": "https://github.com/dompdf/dompdf/blob/v2.0.3/src/Image/Cache.php#L136-L153"
}
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"title": "CVE Program Container"
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],
"cna": {
"affected": [
{
"product": "dompdf",
"vendor": "dompdf",
"versions": [
{
"status": "affected",
"version": "\u003c 2.0.4"
}
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"descriptions": [
{
"lang": "en",
"value": "Dompdf is an HTML to PDF converter for PHP. When parsing SVG images Dompdf performs an initial validation to ensure that paths within the SVG are allowed. One of the validations is that the SVG document does not reference itself. However, prior to version 2.0.4, a recursive chained using two or more SVG documents is not correctly validated. Depending on the system configuration and attack pattern this could exhaust the memory available to the executing process and/or to the server itself.\n\nphp-svg-lib, when run in isolation, does not support SVG references for `image` elements. However, when used in combination with Dompdf, php-svg-lib will process SVG images referenced by an `image` element. Dompdf currently includes validation to prevent self-referential `image` references, but a chained reference is not checked. A malicious actor may thus trigger infinite recursion by chaining references between two or more SVG images.\n\nWhen Dompdf parses a malicious payload, it will crash due after exceeding the allowed execution time or memory usage. An attacker sending multiple request to a system can potentially cause resource exhaustion to the point that the system is unable to handle incoming request.\n\nVersion 2.0.4 contains a fix for this issue."
}
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"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20: Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-674",
"description": "CWE-674: Uncontrolled Recursion",
"lang": "en",
"type": "CWE"
}
]
}
],
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{
"name": "https://github.com/dompdf/dompdf/commit/41cbac16f3cf56affa49f06e8dae66d0eac2b593",
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"url": "https://github.com/dompdf/dompdf/commit/41cbac16f3cf56affa49f06e8dae66d0eac2b593"
},
{
"name": "https://github.com/dompdf/dompdf/blob/v2.0.3/src/Image/Cache.php#L136-L153",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/dompdf/dompdf/blob/v2.0.3/src/Image/Cache.php#L136-L153"
}
],
"source": {
"advisory": "GHSA-3qx2-6f78-w2j2",
"discovery": "UNKNOWN"
},
"title": "Dompdf possible DoS caused by infinite recursion when parsing SVG images"
}
},
"cveMetadata": {
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"cveId": "CVE-2023-50262",
"datePublished": "2023-12-13T20:52:56.173Z",
"dateReserved": "2023-12-05T20:42:59.379Z",
"dateUpdated": "2024-08-02T22:16:46.642Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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