{ "CVE_data_meta": { "ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2020-07-08T16:00:00.000Z", "ID": "CVE-2020-1655", "STATE": "PUBLIC", "TITLE": "Junos OS: MX Series: PFE crash on MPC7/8/9 upon receipt of large packets requiring fragmentation" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Junos OS", "version": { "version_data": [ { "platform": "MX Series", "version_affected": "!<", "version_value": "17.2" }, { "platform": "MX Series", "version_affected": "<", "version_name": "17.2", "version_value": "17.2R3-S4" }, { "platform": "MX Series", "version_affected": "<", "version_name": "17.3", "version_value": "17.3R3-S8" }, { "platform": "MX Series", "version_affected": "<", "version_name": "17.4", "version_value": "17.4R2-S10, 17.4R3-S2" }, { "platform": "MX Series", "version_affected": "<", "version_name": "18.1", "version_value": "18.1R3-S10" }, { "platform": "MX Series", "version_affected": "<", "version_name": "18.2", "version_value": "18.2R3-S3" }, { "platform": "MX Series", "version_affected": "<", "version_name": "18.2X75", "version_value": "18.2X75-D41, 18.2X75-D430, 18.2X75-D65" }, { "platform": "MX Series", "version_affected": "<", "version_name": "18.3", "version_value": "18.3R1-S7, 18.3R2-S4, 18.3R3-S1" }, { "platform": "MX Series", "version_affected": "<", "version_name": "18.4", "version_value": "18.4R1-S7, 18.4R2-S4, 18.4R3" }, { "platform": "MX Series", "version_affected": "<", "version_name": "19.1", "version_value": "19.1R1-S5, 19.1R2-S1, 19.1R3" }, { "platform": "MX Series", "version_affected": "<", "version_name": "19.2", "version_value": "19.2R1-S4, 19.2R2" }, { "platform": "MX Series", "version_affected": "<", "version_name": "19.3", "version_value": "19.3R2-S2, 19.3R3" } ] } } ] }, "vendor_name": "Juniper Networks" } ] } }, "configuration": [ { "lang": "eng", "value": "A sample configuration for enabling inline IP reassembly is shown below:\n\n set chassis fpc 8 pic 0 inline-services bandwidth 100g\n\nNote: Explicitly specifying a bandwidth for L2TP LNS tunnel traffic using inline services is not required. When a bandwidth is not specified, the maximum bandwidth supported on the PIC is automatically available for the inline services.\n" } ], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "When a device running Juniper Networks Junos OS with MPC7, MPC8, or MPC9 line cards installed and the system is configured for inline IP reassembly, used by L2TP, MAP-E, GRE, and IPIP, the packet forwarding engine (PFE) will become disabled upon receipt of large packets requiring fragmentation, generating the following error messages: [LOG: Err] MQSS(0): WO: Packet Error - Error Packets 1, Connection 29 [LOG: Err] eachip_hmcif_rx_intr_handler(7259): EA[0:0]: HMCIF Rx: Injected checksum error detected on WO response - Chunk Address 0x0 [LOG: Err] MQSS(0): DRD: RORD1: CMD reorder ID error - Command 11, Reorder ID 1838, QID 0 [LOG: Err] MQSS(0): DRD: UNROLL0: HMC chunk length error in stage 5 - Chunk Address: 0x4321f3 [LOG: Err] MQSS(0): DRD: UNROLL0: HMC chunk address error in stage 5 - Chunk Address: 0x0 [LOG: Notice] Error: /fpc/8/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_DRD_RORD_ENG_INT_REG_CMD_FSM_STATE_ERR (0x2203cc), scope: pfe, category: functional, severity: major, module: MQSS(0), type: DRD_RORD_ENG_INT: CMD FSM State Error [LOG: Notice] Performing action cmalarm for error /fpc/8/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_DRD_RORD_ENG_INT_REG_CMD_FSM_STATE_ERR (0x2203cc) in module: MQSS(0) with scope: pfe category: functional level: major [LOG: Notice] Performing action get-state for error /fpc/8/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_DRD_RORD_ENG_INT_REG_CMD_FSM_STATE_ERR (0x2203cc) in module: MQSS(0) with scope: pfe category: functional level: major [LOG: Notice] Performing action disable-pfe for error /fpc/8/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_DRD_RORD_ENG_INT_REG_CMD_FSM_STATE_ERR (0x2203cc) in module: MQSS(0) with scope: pfe category: functional level: major By continuously sending fragmented packets that cannot be reassembled, an attacker can repeatedly disable the PFE causing a sustained Denial of Service (DoS). This issue affects Juniper Networks Junos OS: 17.2 versions prior to 17.2R3-S4 on MX Series; 17.3 versions prior to 17.3R3-S8 on MX Series; 17.4 versions prior to 17.4R2-S10, 17.4R3-S2 on MX Series; 18.1 versions prior to 18.1R3-S10 on MX Series; 18.2 versions prior to 18.2R3-S3 on MX Series; 18.2X75 versions prior to 18.2X75-D41, 18.2X75-D430, 18.2X75-D65 on MX Series; 18.3 versions prior to 18.3R1-S7, 18.3R2-S4, 18.3R3-S1 on MX Series; 18.4 versions prior to 18.4R1-S7, 18.4R2-S4, 18.4R3 on MX Series; 19.1 versions prior to 19.1R1-S5, 19.1R2-S1, 19.1R3 on MX Series; 19.2 versions prior to 19.2R1-S4, 19.2R2 on MX Series; 19.3 versions prior to 19.3R2-S2, 19.3R3 on MX Series. This issue is specific to inline IP reassembly, introduced in Junos OS 17.2. Versions of Junos OS prior to 17.2 are unaffected by this vulnerability." } ] }, "exploit": [ { "lang": "eng", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability." } ], "generator": { "engine": "Vulnogram 0.0.9" }, "impact": { "cvss": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1" } }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "Denial of Service" } ] } ] }, "references": { "reference_data": [ { "name": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/l2tp-lns-inline-service-interfaces.html", "refsource": "MISC", "url": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/l2tp-lns-inline-service-interfaces.html" }, { "name": "https://kb.juniper.net/JSA11041", "refsource": "CONFIRM", "url": "https://kb.juniper.net/JSA11041" } ] }, "solution": [ { "lang": "eng", "value": "The following software releases have been updated to resolve this specific issue: Junos OS 17.2R3-S4, 17.3R3-S8, 17.4R2-S10, 17.4R3-S2, 18.1R3-S10, 18.2R3-S3, 18.2X75-D41, 18.2X75-D430, 18.2X75-D65, 18.3R1-S7, 18.3R2-S4, 18.3R3-S1, 18.4R1-S7, 18.4R2-S4, 18.4R3, 19.1R1-S5, 19.1R2-S1, 19.1R3, 19.2R1-S4, 19.2R2, 19.3R2-S2, 19.3R3, 19.4R1, 19.4R2, 20.1R1, and all subsequent releases.\n" } ], "source": { "advisory": "JSA11041", "defect": [ "1474154" ], "discovery": "USER" }, "work_around": [ { "lang": "eng", "value": "There are no available workarounds for this issue." } ] }