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AUSCERT External Security Bulletin Redistribution
ESB-2020.3552
JSA11046 - 2020-10 Security Bulletin: Junos OS: FreeBSD-SA-20:03.thrmisc:
kernel stack data disclosure (CVE-2019-15875)
15 October 2020
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AusCERT Security Bulletin Summary
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Product: Junos OS
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-15875
Reference: ESB-2020.0327
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11046
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2020-10 Security Bulletin: Junos OS: FreeBSD-SA-20:03.thrmisc:
kernel stack data disclosure (CVE-2019-15875)
Article ID : JSA11046
Last Updated: 14 Oct 2020
Version : 1.0
Product Affected:
This issue affects Junos OS 15.1, 17.2X75, 17.3, 17.4, 18.1, 18.2, 18.2X75,
18.3, 18.4, 19.1, 19.2, 19.3, 19.4, 20.1.
Problem:
The Juniper Networks Junos OS kernel can create a core dump file when a process
crashes that contains process state, for debugging. Due to incorrect
initialization of a stack data structure, up to 20 bytes of kernel data
previously stored on the stack will be exposed to a crashing user process,
potentially disclosing sensitive kernel data.
This issue affects Juniper Networks Junos OS:
o 15.1 versions prior to 15.1R7-S8;
o 17.2X75 versions prior to 17.2X75-D45;
o 17.3 versions prior to 17.3R3-S9;
o 17.4 versions prior to 17.4R2-S11, 17.4R3-S2;
o 18.1 versions prior to 18.1R3-S10;
o 18.2 versions prior to 18.2R2-S7, 18.2R3-S5;
o 18.2X75 versions prior to 18.2X75-D34, 18.2X75-D430, 18.2X75-D53,
18.2X75-D60, 18.2X75-D65, 18.2X75-D70;
o 18.3 versions prior to 18.3R2-S4, 18.3R3-S2;
o 18.4 versions prior to 18.4R1-S7, 18.4R2-S4, 18.4R3-S2;
o 19.1 versions prior to 19.1R1-S5, 19.1R3-S1;
o 19.2 versions prior to 19.2R1-S5, 19.2R2;
o 19.3 versions prior to 19.3R2-S3, 19.3R3;
o 19.4 versions prior to 19.4R1-S2, 19.4R2;
o 20.1 versions prior to 20.1R1-S1, 20.1R2.
This issue only affects Junos OS 15.1R1 and subsequent releases. Junos OS
15.1X49, and earlier versions of Junos OS, are unaffected by this
vulnerability.
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue has been assigned CVE-2019-15875 .
Solution:
The following software releases have been updated to resolve this specific
issue: 15.1R7-S8, 17.2X75-D45, 17.3R3-S9, 17.4R2-S11, 17.4R3-S2, 18.1R3-S10,
18.2R2-S7, 18.2R3-S5, 18.2X75-D34, 18.2X75-D430, 18.2X75-D53, 18.2X75-D60,
18.2X75-D65, 18.2X75-D70, 18.3R2-S4, 18.3R3-S2, 18.4R1-S7, 18.4R2-S4,
18.4R3-S2, 19.1R1-S5, 19.1R3-S1, 19.2R1-S5, 19.2R2, 19.3R2-S3, 19.3R3,
19.4R1-S2, 19.4R2, 20.1R1-S1, 20.1R2, 20.2R1, and all subsequent releases.
This issue is being tracked as 1485747 .
Workaround:
Limit access to the Junos CLI and shell to only trusted administrators.
Implementation:
Software releases or updates are available for download at https://
www.juniper.net/support/downloads/ .
Modification History:
2020-10-14: Initial Publication
CVSS Score:
5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
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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