152 lines
7.3 KiB
JSON
152 lines
7.3 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-2025-59529",
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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": "2025-09-17T17:04:20.373Z",
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"datePublished": "2025-12-18T20:25:31.499Z",
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"dateUpdated": "2026-10-23T19:33:17.866Z"
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},
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"containers": {
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"cna": {
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"title": "Avahi: simple protocol server ignores accepts unlimited connections and logs failures without limit",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-400",
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"lang": "en",
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"description": "CWE-400: Uncontrolled Resource Consumption",
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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": "LOW",
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"attackVector": "LOCAL",
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"availabilityImpact": "HIGH",
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"baseScore": 5.5,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "LOW",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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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"references": [
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{
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"name": "https://github.com/avahi/avahi/security/advisories/GHSA-73wf-3xmj-x82q",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/avahi/avahi/security/advisories/GHSA-73wf-3xmj-x82q"
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},
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{
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"name": "https://github.com/avahi/avahi/pull/808",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/avahi/avahi/pull/808"
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},
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{
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"name": "https://github.com/avahi/avahi/pull/975",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/avahi/avahi/pull/975"
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},
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{
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"name": "https://zeropath.com/blog/avahi-simple-protocol-server-dos-cve-2025-59529",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://zeropath.com/blog/avahi-simple-protocol-server-dos-cve-2025-59529"
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}
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],
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"affected": [
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{
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"vendor": "avahi",
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"product": "avahi",
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"versions": [
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{
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"version": "<= 0.9-rc5",
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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": "2026-10-23T19:33:17.866Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In versions up to and including 0.9-rc5, the simple protocol server ignores the documented client limit and accepts unlimited connections, allowing for easy local DoS. Although `CLIENTS_MAX` is defined, `server_work()` unconditionally `accept()`s and `client_new()` always appends the new client and increments `n_clients`. There is no check against the limit. When client cannot be accepted as a result of maximal socket number of avahi-daemon, it logs unconditionally error per each connection. Unprivileged local users can exhaust daemon memory and file descriptors, causing a denial of service system-wide for mDNS/DNS-SD. Exhausting local file descriptors causes increased system load caused by logging errors of each of request. Overloading prevents glibc calls using nss-mdns plugins to resolve `*.local.` names and link-local addresses. As of time of publication, no known patched versions are available, but a candidate fix is available in pull request 808, and some workarounds are available. Simple clients are offered for nss-mdns package functionality. It is not possible to disable the unix socket `/run/avahi-daemon/socket`, but resolution requests received via DBus are not affected directly. Tools avahi-resolve, avahi-resolve-address and avahi-resolve-host-name are not affected, they use DBus interface. It is possible to change permissions of unix socket after avahi-daemon is started. But avahi-daemon does not provide any configuration for it. Additional access restrictions like SELinux can also prevent unwanted tools to access the socket and keep resolution working for trusted users."
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}
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],
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"source": {
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"advisory": "GHSA-73wf-3xmj-x82q",
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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": "2025-12-18T20:41:46.401974Z",
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"id": "CVE-2025-59529",
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"options": [
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{
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"Exploitation": "poc"
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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": "2025-12-18T20:41:55.199Z"
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}
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},
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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/2025/12/19/1"
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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": "2025-12-19T22:04:36.268Z"
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}
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}
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]
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}
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} |