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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2020.2586
Multiple vulnerabilities in Junos OS
29 July 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Junos OS
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-1655 CVE-2020-1649
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11036
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11041
Comment: This bulletin contains two (2) Juniper Networks security advisories.
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2020-07 Security Bulletin:Junos OS: MX Series: PFE crash on MPC7/8/9 upon receipt
of small fragments requiring reassembly (CVE-2020-1649)
Article ID : JSA11036
Last Updated: 28 Jul 2020
Version : 5.0
Product Affected:
This issue affects Junos OS 17.2, 17.3, 17.4, 18.1, 18.2, 18.2X75, 18.3, 18.4,
19.1, 19.2, 19.3. Affected platforms: MX Series.
Problem:
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, and GRE, the packet forwarding engine (PFE) will become disabled
upon receipt of small fragments requiring reassembly, generating the following
error messages:
[LOG: Err] MQSS(2): WO: Packet Error - Error Packets 1, Connection 29
[LOG: Err] eachip_hmcif_rx_intr_handler(7259): EA[2:0]: HMCIF Rx: Injected
checksum error detected on WO response - Chunk Address 0x0
[LOG: Err] MQSS(2): DRD: RORD1: CMD reorder ID error - Command 11, Reorder ID
1960, QID 0
[LOG: Err] MQSS(2): DRD: UNROLL0: HMC chunk address error in stage 5 - Chunk
Address: 0xc38fb1
[LOG: Notice] Error: /fpc/0/pfe/0/cm/0/MQSS(2)/2/
MQSS_CMERROR_DRD_RORD_ENG_INT_REG_CMD_FSM_STATE_ERR (0x2203cc), scope: pfe,
category: functional, severity: major, module: MQSS(2), type: DRD_RORD_ENG_INT:
CMD FSM State Error
[LOG: Notice] Performing action cmalarm for error /fpc/0/pfe/0/cm/0/MQSS(2)/2/
MQSS_CMERROR_DRD_RORD_ENG_INT_REG_CMD_FSM_STATE_ERR (0x2203cc) in module: MQSS
(2) with scope: pfe category: functional level: major
[LOG: Notice] Performing action get-state for error /fpc/0/pfe/0/cm/0/MQSS(2)/2
/MQSS_CMERROR_DRD_RORD_ENG_INT_REG_CMD_FSM_STATE_ERR (0x2203cc) in module: MQSS
(2) with scope: pfe category: functional level: major
[LOG: Notice] Performing action disable-pfe for error /fpc/0/pfe/0/cm/0/MQSS(2)
/2/MQSS_CMERROR_DRD_RORD_ENG_INT_REG_CMD_FSM_STATE_ERR (0x2203cc) in module:
MQSS(2) 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:
o 17.2 versions prior to 17.2R3-S4 on MX Series;
o 17.3 versions prior to 17.3R3-S8 on MX Series;
o 17.4 versions prior to 17.4R2-S9, 17.4R3-S1 on MX Series;
o 18.1 versions prior to 18.1R3-S10 on MX Series;
o 18.2 versions prior to 18.2R2-S6, 18.2R3-S3 on MX Series;
o 18.2X75 versions prior to 18.2X75-D34, 18.2X75-D41, 18.2X75-D53,
18.2X75-D65, 18.2X75-D430 on MX Series;
o 18.3 versions prior to 18.3R1-S7, 18.3R2-S4, 18.3R3-S2 on MX Series;
o 18.4 versions prior to 18.4R1-S6, 18.4R2-S4, 18.4R3 on MX Series;
o 19.1 versions prior to 19.1R1-S4, 19.1R2-S1, 19.1R3 on MX Series;
o 19.2 versions prior to 19.2R1-S3, 19.2R2 on MX Series;
o 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.
A sample configuration for enabling inline IP reassembly is shown below:
set chassis fpc 8 pic 0 inline-services bandwidth 100g
Note: Explicitly specifying a bandwidth for 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.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
This issue has been assigned CVE-2020-1649 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 17.2R3-S4, 17.3R3-S8, 17.4R2-S9, 17.4R3-S1, 18.1R3-S10,
18.2R2-S6, 18.2R3-S3, 18.2X75-D34, 18.2X75-D41, 18.2X75-D53, 18.2X75-D65,
18.2X75-D430, 18.3R1-S7, 18.3R2-S4, 18.3R3-S2, 18.4R1-S6, 18.4R2-S4, 18.4R3,
19.1R1-S4, 19.1R2-S1, 19.1R3, 19.2R1-S3, 19.2R2, 19.3R2-S2, 19.3R3, 19.4R1,
19.4R2, 20.1R1, and all subsequent releases.
This issue is being tracked as 1465490 .
Workaround:
There are no available workarounds for this issue.
Implementation:
Software releases or updates are available for download at https://
www.juniper.net/support/downloads/ .
Modification History:
2020-07-08: Initial publication
2020-07-28: Removed reference to IPIP reassembly
CVSS Score:
7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
High
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
- --------------------------------------------------------------------------------
2020-07 Security Bulletin: Junos OS: MX Series: PFE crash on MPC7/8/9 upon receipt
of large packets requiring fragmentation (CVE-2020-1655)
Article ID : JSA11041
Last Updated: 28 Jul 2020
Version : 2.0
Product Affected:
This issue affects Junos OS 17.2, 17.3, 17.4, 18.1, 18.2, 18.2X75, 18.3, 18.4,
19.1, 19.2, 19.3. Affected platforms: MX Series.
Problem:
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
MAP-E, 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:
o 17.2 versions prior to 17.2R3-S4 on MX Series;
o 17.3 versions prior to 17.3R3-S8 on MX Series;
o 17.4 versions prior to 17.4R2-S10, 17.4R3-S2 on MX Series;
o 18.1 versions prior to 18.1R3-S10 on MX Series;
o 18.2 versions prior to 18.2R3-S3 on MX Series;
o 18.2X75 versions prior to 18.2X75-D41, 18.2X75-D430, 18.2X75-D65 on MX
Series;
o 18.3 versions prior to 18.3R1-S7, 18.3R2-S4, 18.3R3-S1 on MX Series;
o 18.4 versions prior to 18.4R1-S7, 18.4R2-S4, 18.4R3 on MX Series;
o 19.1 versions prior to 19.1R1-S5, 19.1R2-S1, 19.1R3 on MX Series;
o 19.2 versions prior to 19.2R1-S4, 19.2R2 on MX Series;
o 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.
A sample configuration for enabling inline IP reassembly is shown below:
set chassis fpc 8 pic 0 inline-services bandwidth 100g
Note: Explicitly specifying a bandwidth for 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.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
This issue has been assigned CVE-2020-1655 .
Solution:
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.
This issue is being tracked as 1474154 .
Workaround:
There are no available workarounds for this issue.
Implementation:
Software releases or updates are available for download at https://
www.juniper.net/support/downloads/ .
Modification History:
2020-07-08: Initial publication
2020-07-28: Only MAP-E configurations affected
CVSS Score:
5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Severity Level:
Medium
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
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