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3 vulnerabilities found for asn1scc by esa
CVE-2026-76077 (GCVE-0-2026-76077)
Vulnerability from cvelistv5
Published
2026-11-05 16:49
Modified
2026-11-05 16:49
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, the XER tokenizer NT() in asn1crt/asn1crt_encoding_xer.c, which is reached by all XER decode paths, copies tag characters into a fixed char Value[100] field without a length bound and reads input and lookahead bytes without checking the buffer count. A crafted XER message with an overlong tag can overwrite the tokenizer's stack frame, while a truncated tag or unterminated processing-instruction or comment sequence can read beyond the input and may cause a CPU spin. The flaws can disclose adjacent memory, corrupt stack data, crash or hang the decoder, and potentially permit code execution. This issue is fixed in version 4.7.0.1.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
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"cna": {
"affected": [
{
"product": "asn1scc",
"vendor": "esa",
"versions": [
{
"status": "affected",
"version": "\u003c 4.7.0.1"
}
]
}
],
"descriptions": [
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"lang": "en",
"value": "ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, the XER tokenizer NT() in asn1crt/asn1crt_encoding_xer.c, which is reached by all XER decode paths, copies tag characters into a fixed char Value[100] field without a length bound and reads input and lookahead bytes without checking the buffer count. A crafted XER message with an overlong tag can overwrite the tokenizer\u0027s stack frame, while a truncated tag or unterminated processing-instruction or comment sequence can read beyond the input and may cause a CPU spin. The flaws can disclose adjacent memory, corrupt stack data, crash or hang the decoder, and potentially permit code execution. This issue is fixed in version 4.7.0.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-120",
"description": "CWE-120: Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787: Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
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},
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{
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"x_refsource_CONFIRM"
],
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},
{
"name": "https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9"
},
{
"name": "https://github.com/esa/asn1scc/releases/tag/4.7.0.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/esa/asn1scc/releases/tag/4.7.0.1"
}
],
"source": {
"advisory": "GHSA-38q3-fg5h-wwf9",
"discovery": "UNKNOWN"
},
"title": "ASN1SCC: Stack buffer overflow and out-of-bounds read in XER tokenizer NT()"
}
},
"cveMetadata": {
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"dateReserved": "2026-08-18T21:17:32.199Z",
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}
CVE-2026-75615 (GCVE-0-2026-75615)
Vulnerability from cvelistv5
Published
2026-11-05 16:49
Modified
2026-11-05 16:49
Severity ?
VLAI Severity ?
EPSS score ?
Summary
ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, the ACN runtime function Acn_Dec_String_CharIndex_private in asn1crt/asn1crt_encoding_acn.c and the generated uPER decoder InternalItem_string_with_alpha_decode in StgC/uper_c.stg do not validate a decoded character index before reading allowedCharSet. For string alphabets whose size is not a power of two, a crafted message can select an unused encoded index, read a small bounded window of adjacent static program constants, and return the byte as a successfully decoded character. The full 128-character IA5String alphabet is not affected. This issue is fixed in version 4.7.0.1.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
"containers": {
"cna": {
"affected": [
{
"product": "asn1scc",
"vendor": "esa",
"versions": [
{
"status": "affected",
"version": "\u003c 4.7.0.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, the ACN runtime function Acn_Dec_String_CharIndex_private in asn1crt/asn1crt_encoding_acn.c and the generated uPER decoder InternalItem_string_with_alpha_decode in StgC/uper_c.stg do not validate a decoded character index before reading allowedCharSet. For string alphabets whose size is not a power of two, a crafted message can select an unused encoded index, read a small bounded window of adjacent static program constants, and return the byte as a successfully decoded character. The full 128-character IA5String alphabet is not affected. This issue is fixed in version 4.7.0.1."
}
],
"metrics": [
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"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
}
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],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-129",
"description": "CWE-129: Improper Validation of Array Index",
"lang": "en",
"type": "CWE"
}
]
}
],
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"references": [
{
"name": "https://github.com/esa/asn1scc/security/advisories/GHSA-234q-m7gr-pcf8",
"tags": [
"x_refsource_CONFIRM"
],
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{
"name": "https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9",
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],
"url": "https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9"
},
{
"name": "https://github.com/esa/asn1scc/releases/tag/4.7.0.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/esa/asn1scc/releases/tag/4.7.0.1"
}
],
"source": {
"advisory": "GHSA-234q-m7gr-pcf8",
"discovery": "UNKNOWN"
},
"title": "ASN1SCC: Out-of-bounds read via unvalidated character index in ASN.1 string decoders"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"datePublished": "2026-11-05T16:49:20.422Z",
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CVE-2026-75614 (GCVE-0-2026-75614)
Vulnerability from cvelistv5
Published
2026-11-05 16:47
Modified
2026-11-05 18:26
Severity ?
VLAI Severity ?
EPSS score ?
Summary
ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, BitStream_DecodeConstraintWholeNumber in asn1crt/asn1crt_encoding.c reads enough bits for a constrained integer but does not reject values above the declared range when the encoded range is not a power of two. Generated uPER and ACN decoders for variable-size SEQUENCE OF, OCTET STRING, BIT STRING, and string values use the invalid result as a loop or copy length, so a crafted over-range size field can write beyond a destination buffer. Decoding untrusted affected data can corrupt heap or stack memory, cause a crash, or potentially permit code execution. This issue is fixed in version 4.7.0.1.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
"containers": {
"adp": [
{
"metrics": [
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"options": [
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-11-05T18:25:12.643188Z",
"version": "2.0.3"
},
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}
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}
],
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