186 lines
8.1 KiB
JSON
186 lines
8.1 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-2026-64194",
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"assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
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"state": "PUBLISHED",
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"assignerShortName": "CPANSec",
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"dateReserved": "2026-07-19T10:13:00.756Z",
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"datePublished": "2026-07-20T17:55:05.169Z",
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"dateUpdated": "2026-08-30T20:06:49.756Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"collectionURL": "https://cpan.org/modules",
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"defaultStatus": "unaffected",
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"packageName": "Net-DNS",
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"product": "Net::DNS",
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"programFiles": [
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"lib/Net/DNS/DomainName.pm"
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],
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"programRoutines": [
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{
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"name": "Net::DNS::DomainName::decode"
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}
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],
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"repo": "https://www.net-dns.org/svn/net-dns/",
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"vendor": "NLNETLABS",
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"versions": [
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{
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"lessThanOrEqual": "1.55",
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"status": "affected",
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"version": "0",
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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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"credits": [
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{
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"lang": "en",
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"type": "reporter",
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"value": "Steffen Ullrich"
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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": "Net::DNS versions through 1.55 for Perl allow Denial of Service via deep DNS compression pointer chains.\n\nNet::DNS::DomainName::decode follows RFC 1035 compression pointers by recursing into itself with no depth limit. It is possible to construct a name which saturates the call stack (at least with larger TCP responses), leading to a potential Denial of Service.\n\nThe guard `$link < $offset` prevents forward and circular chains, but still allows arbitrarily long backward chains. The per-offset cache (`$cache`) is populated at the start of each call and short-circuits only re-traverses of the same offset - the initial descent through a fresh chain still recurses at full depth.\n\nA crafted packet can chain two-byte compression pointers so that each one points two bytes earlier than the previous, producing a chain length of `offset / 2`. For the 14-bit pointer field (max offset 16383) this gives up to ~8191 recursive frames. For a TCP DNS message the limit is the 16-bit length field (~32767 frames). Perl's default C stack handles only a few thousand frames; beyond that the process receives SIGSEGV or similar, which is a denial-of-service for any application parsing untrusted DNS data.\n\nThe vulnerability is triggered by `Net::DNS::Packet->new(\\$wire)` i.e. any point where the library decodes a DNS message from the network."
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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-674",
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"description": "CWE-674 Uncontrolled Recursion",
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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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"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
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"shortName": "CPANSec",
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"dateUpdated": "2026-07-20T17:55:05.169Z"
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},
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"references": [
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{
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"url": "https://www.net-dns.org/blog/#release-candidate-for-netdns-1.56"
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},
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{
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"tags": [
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"issue-tracking"
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],
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"url": "https://rt.cpan.org/Ticket/Display.html?id=179946"
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},
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{
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"tags": [
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"release-notes"
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],
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"url": "https://metacpan.org/release/NLNETLABS/Net-DNS-1.55_01/changes"
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}
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],
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"solutions": [
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{
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"lang": "en",
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"value": "Upgrade to version 1.56 or later."
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"timeline": [
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{
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"lang": "en",
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"time": "2026-07-10T00:00:00.000Z",
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"value": "Issue reported publicly via RT."
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},
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{
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"lang": "en",
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"time": "2026-07-10T00:00:00.000Z",
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"value": "Version 1.55_01 (release candidate for version 1.56) published on CPAN."
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},
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{
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"lang": "en",
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"time": "2026-07-18T00:00:00.000Z",
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"value": "Version 1.56 published on CPAN."
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}
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],
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"title": "Net::DNS versions through 1.55 for Perl allow Denial of Service via deep DNS compression pointer chains",
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"x_generator": {
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"engine": "cpansec-cna-tool 0.1"
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}
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},
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"adp": [
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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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"url": "http://www.openwall.com/lists/oss-security/2026/07/20/13"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2026/08/msg00052.html"
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}
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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": "2026-08-30T20:06:49.756Z"
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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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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.5,
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"attackVector": "NETWORK",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "NONE"
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}
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},
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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": "2026-07-21T18:55:36.580996Z",
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"id": "CVE-2026-64194",
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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": "yes"
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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": "2026-07-21T18:56:01.149Z"
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}
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}
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]
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}
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} |