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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.2392
2021-07 Security Bulletin: Junos OS:Multiple vulnerabiltiies
15 July 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Junos OS
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Root Compromise -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-0290 CVE-2021-0282 CVE-2021-0280
CVE-2021-0278 CVE-2018-6925 CVE-2017-1087
Reference: ESB-2017.3133
ESB-2017.2912
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11177
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11178
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11182
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11184
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11186
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11192
Comment: This bulletin contains six (6) Juniper Networks security advisories.
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2021-07 Security Bulletin: Junos OS: FreeBSD-SA-17:09.shm : POSIX shm allows jails to access global namespace (CVE-2017-1087)
Article ID : JSA11177
Last Updated: 14 Jul 2021
Version : 3.0
Product Affected:
This issue affects Junos OS 15.1, 17.3.
Problem:
An Improper Limitation of a Pathname to a Restricted Directory ('Path
Traversal') vulnerability, where named paths are globally scoped, meaning a
process located in one jail can read and modify the content of POSIX shared
memory objects created by a process in another jail or the host system of
Juniper Networks Junos OS. As a result, a malicious user that has access to a
jailed system is able to abuse shared memory by injecting malicious content in
the shared memory region. This memory region might be executed by applications
trusting the shared memory. This issue could lead to a Denial of Service (DoS)
or local privilege escalation.
This issue affects:
Juniper Networks Junos OS
o 15.1 versions prior to 15.1R7-S9;
o 17.3 versions prior to 17.3R3-S11.
This issue does not affect SRX Series.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was discovered during external security research.
This issue has been assigned CVE-2017-1087 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 15.1R7-S9, 17.3R3-S11 and all subsequent releases.
This issue is being tracked as 1325911 .
Workaround:
There are no viable workarounds for this issue.
To reduce the risk of malicious exploitation, use access lists or firewall
filters to limit CLI access to the device only from trusted, administrative
networks or hosts. Additionally, limit access to the Junos OS shell to only
trusted system administrators.
Implementation:
Software releases or updates are available for download at https://
support.juniper.net/support/downloads/
Modification History:
2021-07-14: Initial Publication.
CVSS Score:
7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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."
- --------------------------------------------------------------------------------
2021-07 Security Bulletin: Junos OS: FreeBSD-EN-18:11.listen: TCP during bind, listen or connect and UDP during bind may experience Denial of Service for IPv6 based sockets. (CVE-2018-6925)
Article ID : JSA11178
Last Updated: 14 Jul 2021
Version : 2.0
Product Affected:
This issue affects Junos OS 12.3, 15.1, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4,
19.1, 19.2, 19.3, 19.4.
Problem:
In Juniper Networks Junos OS there are various cases in the IPv6 socket code
where the protocol control block's state flags are modified during a syscall,
but are not restored if the operation fails. This can leave the control block
in an inconsistent state. The protocol control block is a structure that
maintains the Network Layer state for various sockets. There are various state
flags that must be properly maintained to keep the structure consistent. Due to
improper maintenance of the IPv6 protocol control block flags through various
failure paths, an unprivileged authenticated local user may be able to cause a
NULL pointer dereference causing the kernel to crash allowing an attacker to
cause a Denial of Service (DoS) condition.
This issue only impacts IPv6 TCP/UDP traffic destined to the device; for
example: BGP, Netconf, telnet, SSH, HTTP, HTTPS, etc.
This issue can occur on any interface of a device.
This issue does not affect any other IPv6 Internet Protocol (IP) traffic.
This issue does not impact any IPv4 traffic.
This issue affects:
Juniper Networks Junos OS
o 12.3 versions prior to 12.3R12-S19;
o 15.1 versions prior to 15.1R7-S10;
o 17.3 versions prior to 17.3R3-S12;
o 17.4 versions prior to 17.4R2-S13, 17.4R3-S5;
o 18.1 versions prior to 18.1R3-S13;
o 18.2 versions prior to 18.2R3-S8;
o 18.3 versions prior to 18.3R3-S5;
o 18.4 versions prior to 18.4R3-S8;
o 19.1 versions prior to 19.1R3;
o 19.2 versions prior to 19.2R1-S7, 19.2R2;
o 19.3 versions prior to 19.3R2-S6, 19.3R3;
o 19.4 versions prior to 19.4R1-S4, 19.4R2.
' family inet6 ' must be configured on the device.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was discovered during external security research.
This issue has been assigned CVE-2018-6925 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 12.3R12-S19, 15.1R7-S10, 17.3R3-S12, 17.4R2-S13, 17.4R3-S5,
18.1R3-S13, 18.2R3-S8, 18.3R3-S5, 18.4R3-S8, 19.1R3, 19.2R1-S7, 19.2R2,
19.3R2-S6, 19.3R3, 19.4R1-S4, 19.4R2, 20.1R1, and all subsequent releases.
This issue is being tracked as 1472367 .
Workaround:
There are no viable workarounds for this issue.
To reduce the risk of malicious exploitation, use access lists or firewall
filters to limit CLI access to the device only from trusted, administrative
networks or hosts. Additionally, limit access to the Junos OS shell to only
trusted system administrators.
Implementation:
Software releases or updates are available for download at https://
support.juniper.net/support/downloads/
Modification History:
2021-07-14: Initial Publication.
CVSS Score:
5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
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."
- --------------------------------------------------------------------------------
2021-07 Security Bulletin: Junos OS: J-Web allows a locally authenticated attacker to escalate their privileges to root. (CVE-2021-0278)
Article ID : JSA11182
Last Updated: 14 Jul 2021
Version : 2.0
Product Affected:
This issue affects Junos OS 19.3, 19.4, 20.1, 20.2, 20.3, 20.4, 21.1.
Problem:
An Improper Input Validation vulnerability in J-Web of Juniper Networks Junos
OS allows a locally authenticated attacker to escalate their privileges to root
over the target device.
junos:18.3R3-S5 junos:18.4R3-S9 junos:19.1R3-S6 junos:19.3R2-S6 junos:19.3R3-S3
junos:19.4R1-S4 junos:19.4R3-S4 junos:20.1R2-S2 junos:20.1R3 junos:20.2R3-S1
junos:20.3X75-D20 junos:20.3X75-D30 junos:20.4R2-S1 junos:20.4R3
junos:21.1R1-S1 junos:21.1R2 junos:21.2R1 junos:21.3R1
This issue affects:
Juniper Networks Junos OS
19.3 versions 19.3R1 and above prior to 19.3R2-S6, 19.3R3-S3;
19.4 versions prior to 19.4R3-S5;
20.1 versions prior to 20.1R2-S2, 20.1R3-S1;
20.2 versions prior to 20.2R3-S2;
20.3 versions prior to 20.3R3;
20.4 versions prior to 20.4R2-S1, 20.4R3;
21.1 versions prior to 21.1R1-S1, 21.1R2.
This issue does not affect Juniper Networks Junos OS versions prior to 19.3R1.
The following minimal configuration is necessary:
[system services web-management http]
or
[system services web-management https]
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
However, a proof-of-concept exploit does exist in the wild.
This issue was seen during production usage.
This issue has been assigned CVE-2021-0278 .
Solution:
The following software releases have been updated to resolve this specific
issue: 19.3R2-S6, 19.3R3-S3, 19.4R3-S5, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2,
20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1, and all subsequent
releases.
In addition to the above fixed releases, for the following not-affected
releases additional security enhancements were included in Junos OS 18.3R3-S5,
18.4R3-S9, 19.1R3-S6 as a result of resolving this issue.
This issue is being tracked as 1592021 and 1511853 .
Workaround:
There are no viable workarounds for this issue other than disabling J-Web.
To reduce the risk of exploitation of these issues, use access lists or
firewall filters to limit access to only trusted administrative networks, hosts
and users.
Implementation:
Software releases or updates are available for download at https://
support.juniper.net/support/downloads/
Modification History:
2021-07-14: Initial Publication.
CVSS Score:
8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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."
Acknowledgements:
The Juniper SIRT wishes to thank Luca Ercoli regarding PR 1511853
- --------------------------------------------------------------------------------
2021-07 Security Bulletin: Junos OS: PTX Series and QFX10K Series: Upon receipt of specific packets BFD sessions might flap due to DDoS policer implementation in Packet Forwarding Engine (CVE-2021-0280)
Article ID : JSA11184
Last Updated: 14 Jul 2021
Version : 1.0
Product Affected:
This issue affects Junos OS 17.4, 18.2, 18.3, 18.4, 19.1, 19.2, 19.3, 19.4,
20.1, 20.2, 20.3, 20.4. Affected platforms: PTX Series, QFX10K Series.
Problem:
Due to an Improper Initialization vulnerability in Juniper Networks Junos OS on
PTX platforms and QFX10K Series with Paradise (PE) chipset-based line cards,
ddos-protection configuration changes made from the CLI will not take effect as
expected beyond the default DDoS (Distributed Denial of Service) settings in
the Packet Forwarding Engine (PFE). This may cause BFD sessions to flap when a
high rate of specific packets are received. Flapping of BFD sessions in turn
may impact routing protocols and network stability, leading to a Denial of
Service (DoS) condition. Continued receipt and processing of this packet will
create a sustained Denial of Service (DoS) condition.
This issue affects only the following platforms with Paradise (PE)
chipset-based line cards:
PTX1000, PTX3000 (NextGen), PTX5000, PTX10008, PTX10016 Series and QFX10002
Series.
This issue affects:
Juniper Networks Junos OS
o 17.4 versions prior to 17.4R3-S5 on PTX Series, QFX10K Series;
o 18.2 versions prior to 18.2R3-S8 on PTX Series, QFX10K Series;
o 18.3 versions prior to 18.3R3-S5 on PTX Series, QFX10K Series;
o 18.4 versions prior to 18.4R2-S8 on PTX Series, QFX10K Series;
o 19.1 versions prior to 19.1R3-S5 on PTX Series, QFX10K Series;
o 19.2 versions prior to 19.2R3-S2 on PTX Series, QFX10K Series;
o 19.3 versions prior to 19.3R3-S2 on PTX Series, QFX10K Series;
o 19.4 versions prior to 19.4R3-S2 on PTX Series, QFX10K Series;
o 20.1 versions prior to 20.1R3 on PTX Series, QFX10K Series;
o 20.2 versions prior to 20.2R2-S3, 20.2R3 on PTX Series, QFX10K Series;
o 20.3 versions prior to 20.3R2 on PTX Series, QFX10K Series;
o 20.4 versions prior to 20.4R2 on PTX Series, QFX10K Series.
The examples of the config stanza affected by this issue:
[system ddos-protection global]
[system ddos-protection protocols]
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-2021-0280 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 17.4R3-S5, 18.2R3-S8, 18.3R3-S5, 18.4R2-S8, 19.1R3-S5,
19.2R3-S2, 19.3R3-S2, 19.4R3-S2, 20.1R3, 20.2R2-S3, 20.2R3, 20.3R2, 20.4R2,
21.1R1, and all subsequent releases.
This issue is being tracked as 1564807 .
Workaround:
The default ukern policer rate can be reduced by the CLI command:
set system ddos-protection protocols <protocol-group> <aggregate | packet-type>
bandwidth <packets-per-second> burst <size>
Implementation:
Software releases or updates are available for download at https://
support.juniper.net/support/downloads/
Modification History:
2021-07-14: Initial Publication.
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."
- --------------------------------------------------------------------------------
2021-07 Security Bulletin: Junos OS: RPD crash while processing a specific BGP UPDATE when Multipath or add-path features are enabled (CVE-2021-0282)
Article ID : JSA11186
Last Updated: 14 Jul 2021
Version : 1.0
Product Affected:
This issue affects Junos OS 12.3, 15.1, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4,
19.1.
Problem:
On Juniper Networks Junos OS devices with Multipath or add-path feature
enabled, processing a specific BGP UPDATE can lead to a routing process daemon
(RPD) crash and restart, causing a Denial of Service (DoS). Continued receipt
and processing of this UPDATE message will create a sustained Denial of Service
(DoS) condition.
This BGP UPDATE message can propagate to other BGP peers with vulnerable Junos
versions on which Multipath or add-path feature is enabled, and cause RPD to
crash and restart.
This issue affects both IBGP and EBGP deployments in IPv4 or IPv6 network.
Junos OS devices that do not have the BGP Multipath or add-path feature enabled
are not affected by this issue.
This issue affects:
Juniper Networks Junos OS:
o 12.3 versions prior to 12.3R12-S18;
o 15.1 versions prior to 15.1R7-S9;
o 17.3 versions prior to 17.3R3-S11;
o 17.4 versions prior to 17.4R2-S13, 17.4R3-S4;
o 18.1 versions prior to 18.1R3-S12;
o 18.2 versions prior to 18.2R3-S7;
o 18.3 versions prior to 18.3R3-S4;
o 18.4 versions prior to 18.4R2-S6, 18.4R3-S6;
o 19.1 versions prior to 19.1R3-S3.
The examples of the config stanza affected by this issue:
[ protocols bgp multipath ]
[ protocols bgp group <group-name> multipath ]
or
[ protocols bgp group <group-name> family <family> add-path ]
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-2021-0282 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 12.3R12-S18, 15.1R7-S9, 17.3R3-S11, 17.4R2-S13, 17.4R3-S4,
18.1R3-S12, 18.2R3-S7, 18.3R3-S4, 18.4R2-S6, 18.4R3-S6, 19.1R3-S3, 19.2R1, and
all subsequent releases.
This issue is being tracked as 1412977 .
Workaround:
The BGP Multipath or add-path features can be disabled to mitigate this issue.
Implementation:
Software releases or updates are available for download at https://
support.juniper.net/support/downloads/
Modification History:
2021-07-14: Initial Publication.
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."
- --------------------------------------------------------------------------------
2021-07 Security Bulletin: Junos OS: MX Series, EX9200 Series, SRX4600: Ethernet interface vulnerable to specially crafted frames (CVE-2021-0290)
Article ID : JSA11192
Last Updated: 14 Jul 2021
Version : 2.0
Product Affected:
This issue affects Junos OS 16.1, 17.1, 17.2, 17.3, 17.4, 18.1, 18.2, 18.3,
18.4, 19.1, 19.2, 19.3. Affected platforms: EX9200 Series, MX Series, SRX4600.
Problem:
Improper Handling of Exceptional Conditions in Ethernet interface frame
processing of Juniper Networks Junos OS allows an attacker to send specially
crafted frames over the local Ethernet segment, causing the interface to go
into a down state, resulting in a Denial of Service (DoS) condition. The
interface does not recover on its own and the FPC must be reset manually.
Continued receipt and processing of these frames will create a sustained Denial
of Service (DoS) condition.
This issue is platform-specific and affects the following platforms and line
cards:
o MPC7E/8E/9E and MPC10E on MX240, MX480, MX960, MX2008, MX2010, and MX2020
o MX204, MX10003, MX10008, MX10016
o EX9200, EX9251
o SRX4600
No other products or platforms are affected by this vulnerability.
An indication of this issue occurring can be seen in the system log messages,
as shown below:
user@host> show log messages | match "Failed to complete DFE tuning"
fpc4 smic_phy_dfe_tuning_state: et-4/1/6 - Failed to complete DFE tuning (count
3)
and interface will be in a permanently down state:
user@host> show interfaces et-4/1/6 terse
Interface Admin Link Proto Local Remote
et-4/1/6 up down
et-4/1/6.0 up down aenet --> ae101.0
This issue affects Juniper Networks Junos OS:
o 16.1 versions prior to 16.1R7-S7 on MX Series;
o 17.1R1 and later versions prior to 17.2R3-S3 on MX Series;
o 17.3 versions prior to 17.3R3-S8 on MX Series;
o 17.4 versions prior to 17.4R2-S11, 17.4R3-S1 on MX Series, SRX4600;
o 18.1 versions prior to 18.1R3-S10 on MX Series, EX9200 Series, SRX4600;
o 18.2 versions prior to 18.2R3-S3 on MX Series, EX9200 Series, SRX4600;
o 18.3 versions prior to 18.3R3-S1 on MX Series, EX9200 Series, SRX4600;
o 18.4 versions prior to 18.4R2-S3, 18.4R3 on MX Series, EX9200 Series,
SRX4600;
o 19.1 versions prior to 19.1R2-S1, 19.1R3 on MX Series, EX9200 Series,
SRX4600;
o 19.2 versions prior to 19.2R1-S3, 19.2R2 on MX Series, EX9200 Series,
SRX4600;
o 19.3 versions prior to 19.3R2 on MX Series, EX9200 Series, SRX4600.
This issue does not affect Juniper Networks Junos OS versions prior to 16.1R1.
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-2021-0290 .
Solution:
The following software releases have been updated to resolve this specific
issue: Junos OS 16.1R7-S7, 17.2R3-S3, 17.3R3-S8, 17.4R2-S11, 17.4R3-S1,
17.4R3-S5, 18.1R3-S10, 18.2R3-S3, 18.2R3-S8, 18.3R3-S1, 18.4R2-S3, 18.4R3,
19.1R2-S1, 19.1R3, 19.2R1-S3, 19.2R2, 19.3R2, 19.4R1, and all subsequent
releases.
This issue is being tracked as 1463015 .
Workaround:
There are no viable workarounds for this issue.
Implementation:
Software releases or updates are available for download at https://
support.juniper.net/support/downloads/
Modification History:
2021-07-14: Initial Publication.
CVSS Score:
6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
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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