CVE-2026-3337 (GCVE-0-2026-3337)
Vulnerability from cvelistv5 – Published: 2026-03-02 21:20 – Updated: 2026-03-03 20:04
VLAI?
Title
Timing Side-Channel in AES-CCM Tag Verification in AWS-LC
Summary
Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.
The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.
Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.
Severity ?
CWE
- CWE-208 - (Observable Timing Discrepancy)
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AWS | AWS-LC |
Affected:
1.21.0 , < 1.69.0
(custom)
|
|||||||
|
|||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-3337",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-03T20:03:12.007267Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-03T20:04:27.577Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "AWS-LC",
"vendor": "AWS",
"versions": [
{
"lessThan": "1.69.0",
"status": "affected",
"version": "1.21.0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"product": "AWS-LC-FIPS",
"vendor": "AWS",
"versions": [
{
"lessThan": "3.2.0",
"status": "affected",
"version": "3.0.0",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eObservable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\u003cp\u003eThe impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\u003cp\u003eCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.\u003c/p\u003e\u003cbr\u003e"
}
],
"value": "Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.\n\n\n\n\nThe impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.\n\n\n\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0."
}
],
"impacts": [
{
"capecId": "CAPEC-462",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-462 (Cross-Domain Search Timing)"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-208",
"description": "CWE-208 (Observable Timing Discrepancy)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-02T22:14:33.074Z",
"orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5",
"shortName": "AMZN"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://aws.amazon.com/security/security-bulletins/2026-005-AWS/"
},
{
"tags": [
"patch"
],
"url": "https://github.com/aws/aws-lc/releases/tag/v1.69.0"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://github.com/aws/aws-lc/security/advisories/GHSA-frmv-5gcm-jwxh"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Timing Side-Channel in AES-CCM Tag Verification in AWS-LC",
"x_generator": {
"engine": "Vulnogram 0.5.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5",
"assignerShortName": "AMZN",
"cveId": "CVE-2026-3337",
"datePublished": "2026-03-02T21:20:08.532Z",
"dateReserved": "2026-02-27T15:16:28.371Z",
"dateUpdated": "2026-03-03T20:04:27.577Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-3337\",\"sourceIdentifier\":\"ff89ba41-3aa1-4d27-914a-91399e9639e5\",\"published\":\"2026-03-02T22:16:32.093\",\"lastModified\":\"2026-03-09T14:57:09.440\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.\\n\\n\\n\\n\\nThe impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.\\n\\n\\n\\n\\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.\"},{\"lang\":\"es\",\"value\":\"Una discrepancia de temporizaci\u00f3n observable en el descifrado AES-CCM en AWS-LC permite a un usuario no autenticado determinar potencialmente la validez de la etiqueta de autenticaci\u00f3n mediante an\u00e1lisis de temporizaci\u00f3n.\\n\\nLas implementaciones afectadas son a trav\u00e9s de la API EVP CIPHER: EVP_aes_128_ccm, EVP_aes_192_ccm y EVP_aes_256_ccm.\\n\\nLos clientes de los servicios de AWS no necesitan tomar ninguna medida. Las aplicaciones que utilizan AWS-LC deber\u00edan actualizar a la versi\u00f3n 1.69.0 de AWS-LC.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"ff89ba41-3aa1-4d27-914a-91399e9639e5\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"ff89ba41-3aa1-4d27-914a-91399e9639e5\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"ff89ba41-3aa1-4d27-914a-91399e9639e5\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-208\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:aws:aws_libcrypto:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.21.0\",\"versionEndExcluding\":\"1.69.0\",\"matchCriteriaId\":\"40D383E7-432D-47E2-9294-C94FC0E0BD69\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:aws:aws_libcrypto:*:*:*:*:fips:*:*:*\",\"versionStartIncluding\":\"3.0.0\",\"versionEndExcluding\":\"3.2.0\",\"matchCriteriaId\":\"CB8ED317-0BFE-47CA-82F8-DF184528CE23\"}]}]}],\"references\":[{\"url\":\"https://aws.amazon.com/security/security-bulletins/2026-005-AWS/\",\"source\":\"ff89ba41-3aa1-4d27-914a-91399e9639e5\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://github.com/aws/aws-lc/releases/tag/v1.69.0\",\"source\":\"ff89ba41-3aa1-4d27-914a-91399e9639e5\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/aws/aws-lc/security/advisories/GHSA-frmv-5gcm-jwxh\",\"source\":\"ff89ba41-3aa1-4d27-914a-91399e9639e5\",\"tags\":[\"Vendor Advisory\"]}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-3337\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-03T20:03:12.007267Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-03T20:03:15.485Z\"}}], \"cna\": {\"title\": \"Timing Side-Channel in AES-CCM Tag Verification in AWS-LC\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"impacts\": [{\"capecId\": \"CAPEC-462\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-462 (Cross-Domain Search Timing)\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}, {\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 8.2, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"AWS\", \"product\": \"AWS-LC\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.21.0\", \"lessThan\": \"1.69.0\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"AWS\", \"product\": \"AWS-LC-FIPS\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.2.0\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://aws.amazon.com/security/security-bulletins/2026-005-AWS/\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/aws/aws-lc/releases/tag/v1.69.0\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/aws/aws-lc/security/advisories/GHSA-frmv-5gcm-jwxh\", \"tags\": [\"third-party-advisory\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.5.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.\\n\\n\\n\\n\\nThe impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.\\n\\n\\n\\n\\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eObservable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\u003cp\u003eThe impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\u003cp\u003eCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.\u003c/p\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-208\", \"description\": \"CWE-208 (Observable Timing Discrepancy)\"}]}], \"providerMetadata\": {\"orgId\": \"ff89ba41-3aa1-4d27-914a-91399e9639e5\", \"shortName\": \"AMZN\", \"dateUpdated\": \"2026-03-02T22:14:33.074Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-3337\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-03T20:04:27.577Z\", \"dateReserved\": \"2026-02-27T15:16:28.371Z\", \"assignerOrgId\": \"ff89ba41-3aa1-4d27-914a-91399e9639e5\", \"datePublished\": \"2026-03-02T21:20:08.532Z\", \"assignerShortName\": \"AMZN\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…