192 lines
9.2 KiB
JSON
192 lines
9.2 KiB
JSON
{
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"containers": {
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"cna": {
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"affected": [
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{
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"product": "ohmyzsh/ohmyzsh",
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"vendor": "ohmyzsh",
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"versions": [
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{
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"lessThan": "a263cdac",
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"status": "affected",
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"version": "unspecified",
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"versionType": "custom"
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}
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]
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "# Vulnerability in `title` function **Description**: the `title` function defined in `lib/termsupport.zsh` uses `print` to set the terminal title to a user-supplied string. In Oh My Zsh, this function is always used securely, but custom user code could use the `title` function in a way that is unsafe. **Fixed in**: [a263cdac](https://github.com/ohmyzsh/ohmyzsh/commit/a263cdac). **Impacted areas**: - `title` function in `lib/termsupport.zsh`. - Custom user code using the `title` function."
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}
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],
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"exploits": [
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{
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"lang": "en",
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"value": "**Exploit PoC**:\n\n1. Install Oh My Zsh.\n2. Add a custom function that calls `title` to set the terminal title with a user-supplied string.\n For example:\n\n ```sh\n function dirpath_in_title {\n title \"$PWD\"\n }\n add-zsh-hook precmd dirpath_in_title\n ```\n\n3. Create and cd into a directory with a subshell command as its name:\n\n ```sh\n baddir='`echo pwned && id`'\n mkdir \"$baddir\" && cd \"$baddir\"\n ```\n\n4. The `title` function incorrectly expands the subshell command (see screenshot):\n\n "
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 7.5,
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"baseSeverity": "HIGH",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
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"version": "3.1"
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-78",
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"description": "CWE-78 OS Command Injection",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"dateUpdated": "2021-11-30T09:30:15.000Z",
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"orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
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"shortName": "@huntrdev"
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},
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"references": [
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{
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/ohmyzsh/ohmyzsh/commit/a263cdac"
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}
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],
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"title": "OS Command Injection in ohmyzsh/ohmyzsh",
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"x_legacyV4Record": {
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"CVE_data_meta": {
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"ASSIGNER": "security@huntr.dev",
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"ID": "CVE-2021-3726",
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"STATE": "PUBLIC",
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"TITLE": "OS Command Injection in ohmyzsh/ohmyzsh"
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"product": {
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"product_data": [
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{
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"product_name": "ohmyzsh/ohmyzsh",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_value": "a263cdac"
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}
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]
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}
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}
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]
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},
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"vendor_name": "ohmyzsh"
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}
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]
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}
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},
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"data_format": "MITRE",
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"data_type": "CVE",
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"data_version": "4.0",
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "# Vulnerability in `title` function **Description**: the `title` function defined in `lib/termsupport.zsh` uses `print` to set the terminal title to a user-supplied string. In Oh My Zsh, this function is always used securely, but custom user code could use the `title` function in a way that is unsafe. **Fixed in**: [a263cdac](https://github.com/ohmyzsh/ohmyzsh/commit/a263cdac). **Impacted areas**: - `title` function in `lib/termsupport.zsh`. - Custom user code using the `title` function."
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}
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]
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},
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"exploit": [
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{
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"lang": "en",
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"value": "**Exploit PoC**:\n\n1. Install Oh My Zsh.\n2. Add a custom function that calls `title` to set the terminal title with a user-supplied string.\n For example:\n\n ```sh\n function dirpath_in_title {\n title \"$PWD\"\n }\n add-zsh-hook precmd dirpath_in_title\n ```\n\n3. Create and cd into a directory with a subshell command as its name:\n\n ```sh\n baddir='`echo pwned && id`'\n mkdir \"$baddir\" && cd \"$baddir\"\n ```\n\n4. The `title` function incorrectly expands the subshell command (see screenshot):\n\n "
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}
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],
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"impact": {
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"cvss": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 7.5,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "REQUIRED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
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"version": "3.1"
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}
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "CWE-78 OS Command Injection"
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}
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]
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}
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]
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},
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"references": {
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"reference_data": [
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{
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"name": "https://github.com/ohmyzsh/ohmyzsh/commit/a263cdac",
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"refsource": "MISC",
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"url": "https://github.com/ohmyzsh/ohmyzsh/commit/a263cdac"
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}
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]
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}
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}
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},
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"adp": [
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{
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2024-08-03T17:01:08.345Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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"tags": [
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"x_refsource_MISC",
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"x_transferred"
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],
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"url": "https://github.com/ohmyzsh/ohmyzsh/commit/a263cdac"
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}
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]
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}
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]
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},
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"cveMetadata": {
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"assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
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"assignerShortName": "@huntrdev",
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"cveId": "CVE-2021-3726",
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"datePublished": "2021-11-30T09:30:15.000Z",
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"dateReserved": "2021-08-19T00:00:00.000Z",
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"dateUpdated": "2024-08-03T17:01:08.345Z",
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"state": "PUBLISHED"
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},
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"dataType": "CVE_RECORD",
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"dataVersion": "5.1"
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} |