132 lines
5.6 KiB
JSON
132 lines
5.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-55558",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-06-16T23:11:20.213Z",
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"datePublished": "2026-08-20T14:29:58.580Z",
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"dateUpdated": "2026-08-20T20:00:21.869Z"
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},
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"containers": {
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"cna": {
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"title": "aiosmtplib: STARTTLS response injection",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-74",
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"lang": "en",
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"description": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')",
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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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"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": "NONE",
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"baseScore": 5.9,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/cole/aiosmtplib/security/advisories/GHSA-vxj7-4xrp-5vr4",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/cole/aiosmtplib/security/advisories/GHSA-vxj7-4xrp-5vr4"
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},
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{
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"name": "https://github.com/cole/aiosmtplib/commit/9fab7ba1361dbf7622ede1315a24be805cff09c9",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/cole/aiosmtplib/commit/9fab7ba1361dbf7622ede1315a24be805cff09c9"
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},
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{
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"name": "https://github.com/cole/aiosmtplib/releases/tag/v5.1.2",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/cole/aiosmtplib/releases/tag/v5.1.2"
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}
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],
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"affected": [
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{
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"vendor": "cole",
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"product": "aiosmtplib",
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"versions": [
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{
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"version": "< 5.1.2",
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"status": "affected"
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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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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-08-20T14:29:58.580Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "aiosmtplib is an asynchronous SMTP client for use with asyncio. Prior to 5.1.2, SMTPProtocol.start_tls in src/aiosmtplib/protocol.py consumes the server's 220 response and starts the TLS handshake without clearing SMTPProtocol._buffer. An active network attacker can place attacker-chosen SMTP response lines after the plaintext 220 response in the same network segment. The method then calls loop.start_tls; those bytes survive the transport upgrade and are parsed as the first response from inside the TLS session, desynchronizing subsequent SMTP command and response pairs. Connections using start_tls=True or opportunistic STARTTLS are affected, while connections using use_tls=True are not. This issue is fixed in version 5.1.2."
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}
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],
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"source": {
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"advisory": "GHSA-vxj7-4xrp-5vr4",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-08-20T20:00:16.093023Z",
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"id": "CVE-2026-55558",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-08-20T20:00:21.869Z"
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}
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}
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]
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}
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} |