{"id":"CVE-2023-22415","state":"PUBLISHED","title":"Junos OS: MX Series and SRX Series: The flow processing daemon (flowd) will crash when specific H.323 packets are received","description":"An Out-of-Bounds Write vulnerability in the H.323 ALG of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS). On all MX Series and SRX Series platform, when H.323 ALG is enabled and specific H.323 packets are received simultaneously, a flow processing daemon (flowd) crash will occur. Continued receipt of these specific packets will cause a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on MX Series and SRX Series All versions prior to 19.4R3-S10; 20.2 versions prior to 20.2R3-S6; 20.3 versions prior to 20.3R3-S6; 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3-S3; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R2-S1, 22.1R3; 22.2 versions prior to 22.2R1-S2, 22.2R2.","publishedAt":"2023-01-12T00:00:00.000Z","updatedAt":"2025-04-07T19:54:19.819Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"unspecified","status":"affected","lessThan":"19.4R3-S10","versionType":"custom"},{"version":"20.2","status":"affected","lessThan":"20.2R3-S6","versionType":"custom"},{"version":"20.3","status":"affected","lessThan":"20.3R3-S6","versionType":"custom"},{"version":"20.4","status":"affected","lessThan":"20.4R3-S5","versionType":"custom"},{"version":"21.1","status":"affected","lessThan":"21.1R3-S4","versionType":"custom"},{"version":"21.2","status":"affected","lessThan":"21.2R3-S3","versionType":"custom"},{"version":"21.3","status":"affected","lessThan":"21.3R3-S3","versionType":"custom"},{"version":"21.4","status":"affected","lessThan":"21.4R3","versionType":"custom"},{"version":"22.1","status":"affected","lessThan":"22.1R2-S1, 22.1R3","versionType":"custom"},{"version":"22.2","status":"affected","lessThan":"22.2R1-S2, 22.2R2","versionType":"custom"}],"platforms":["MX Series, SRX Series"]}],"references":["https://kb.juniper.net/JSA70211"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T20:05:43.909Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/22xxx/CVE-2023-22415.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-22415","state":"PUBLISHED","datePublished":"2023-01-12T00:00:00.000Z","dateUpdated":"2025-04-07T19:54:19.819Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2022-12-27T00:00:00.000Z"},"containers":{"cna":{"title":"Junos OS: MX Series and SRX Series: The flow processing daemon (flowd) will crash when specific H.323 packets are received","descriptions":[{"lang":"en","value":"An Out-of-Bounds Write vulnerability in the H.323 ALG of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS). On all MX Series and SRX Series platform, when H.323 ALG is enabled and specific H.323 packets are received simultaneously, a flow processing daemon (flowd) crash will occur. Continued receipt of these specific packets will cause a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on MX Series and SRX Series All versions prior to 19.4R3-S10; 20.2 versions prior to 20.2R3-S6; 20.3 versions prior to 20.3R3-S6; 20.4 versions prior to 20.4R3-S5; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3-S3; 21.3 versions prior to 21.3R3-S3; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R2-S1, 22.1R3; 22.2 versions prior to 22.2R1-S2, 22.2R2."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"unspecified","status":"affected","lessThan":"19.4R3-S10","versionType":"custom"},{"version":"20.2","status":"affected","lessThan":"20.2R3-S6","versionType":"custom"},{"version":"20.3","status":"affected","lessThan":"20.3R3-S6","versionType":"custom"},{"version":"20.4","status":"affected","lessThan":"20.4R3-S5","versionType":"custom"},{"version":"21.1","status":"affected","lessThan":"21.1R3-S4","versionType":"custom"},{"version":"21.2","status":"affected","lessThan":"21.2R3-S3","versionType":"custom"},{"version":"21.3","status":"affected","lessThan":"21.3R3-S3","versionType":"custom"},{"version":"21.4","status":"affected","lessThan":"21.4R3","versionType":"custom"},{"version":"22.1","status":"affected","lessThan":"22.1R2-S1, 22.1R3","versionType":"custom"},{"version":"22.2","status":"affected","lessThan":"22.2R1-S2, 22.2R2","versionType":"custom"}],"platforms":["MX Series, SRX Series"]}],"references":[{"url":"https://kb.juniper.net/JSA70211"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","type":"CWE","lang":"en","description":"CWE-787 Out-of-bounds Write"}]},{"descriptions":[{"type":"text","lang":"en","description":"Denial of Service (DoS)"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2023-01-12T00:00:00.000Z"},"datePublic":"2023-01-11T00:00:00.000Z","x_generator":{"engine":"Vulnogram 0.0.9"},"source":{"advisory":"JSA70211","defect":["1666996"],"discovery":"USER"},"configurations":[{"lang":"en","value":"To be affected the H.323 ALG needs to be enabled, either implicitly / by default or by way of configuration. Please verify with:\n\nCheck if H.323 ALG is enabled by default with:\n  user@host> show security alg status | match H323\n    H323      : Enabled\n\nConfigure H.323 ALG to receive incoming calls with following commands.\n  [set interfaces ge-0/0/0 unit 0 family inet address 10.1.1.1/24]\n  [set interfaces ge-0/0/1 unit 0 family inet address 172.16.1.1/24]\n  [set security zones security-zone private address-book address IP-Phone1 10.1.1.5/32]  \n  [set security zones security-zone private address-book address gatekeeper 10.1.1.25/32 ]\n  [set security zones security-zone private interfaces ge-0/0/0.0  ]\n  [set security zones security-zone public address-book address IP-Phone2 172.16.1.5/32 ]\n  [set security zones security-zone public interfaces ge-0/0/1.0]\n  [set security policies from-zone private to-zone public policy private-to-public match source-address IP-Phone1 ]\n  [set security policies from-zone private to-zone public policy private-to-public match source-address gatekeeper ]\n  [set security policies from-zone private to-zone public policy private-to-public match destination-address IP-Phone2 ]\n  [set security policies from-zone private to-zone public policy private-to-public match application junos-h323 ]\n  [set security policies from-zone private to-zone public policy private-to-public then permit ]\n  [set security policies from-zone public to-zone private policy public-to-private match source-address IP-Phone2 ]\n  [set security policies from-zone public to-zone private policy public-to-private match destination-address IP-Phone1 ]\n  [set security policies from-zone public to-zone private policy public-to-private match destination-address gatekeeper]\n  [set security policies from-zone public to-zone private policy public-to-private match application junos-h323 ]\n  [set security policies from-zone public to-zone private policy public-to-private then permit ]\n"}],"workarounds":[{"lang":"en","value":"There are no known workarounds for this issue, but it should be considered to disable the H.323 ALG if it's not strictly needed."}],"exploits":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: 19.4R3-S10, 20.2R3-S6, 20.3R3-S6, 20.4R3-S5, 21.1R3-S4, 21.2R3-S3, 21.3R3-S3, 21.4R3, 22.1R2-S1, 22.1R3, 22.2R1-S2, 22.2R2, 22.3R1, and all subsequent releases."}]},"adp":[{"title":"CVE Program Container","references":[{"url":"https://kb.juniper.net/JSA70211","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T10:07:06.541Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-04-07T19:54:09.137124Z","id":"CVE-2023-22415","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-04-07T19:54:19.819Z"}}]}}}