Bug 1862469 (CVE-2020-15861) - CVE-2020-15861 net-snmp: combination with can lead to elevated permissions to root
Summary: CVE-2020-15861 net-snmp: combination with can lead to elevated permissions to...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-15861
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1862470
Blocks: 1862471
TreeView+ depends on / blocked
 
Reported: 2020-07-31 13:53 UTC by Marian Rehak
Modified: 2021-02-16 19:35 UTC (History)
4 users (show)

Fixed In Version:
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Last Closed: 2020-08-04 01:27:42 UTC
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Description Marian Rehak 2020-07-31 13:53:03 UTC 
In combination with the *snmp-mibs-downloader package* this protection can be bypassed and it is possible for this account to elevate permissions to the root user.

Upstream Issue:

https://github.com/net-snmp/net-snmp/issues/145

Upstream Commit:

https://github.com/net-snmp/net-snmp/commit/4fd9a450444a434a993bc72f7c3486ccce41f602
Comment 1 Marian Rehak 2020-07-31 13:53:25 UTC 
Created net-snmp tracking bugs for this issue:

Affects: fedora-all [bug 1862470]
Comment 3 Todd Cullum 2020-08-03 23:32:25 UTC 
Statement:

This flaw does not affect net-snmp as shipped with Red Hat Enterprise Linux 5, 6, 7, or 8. There is no snmp-mibs-downloader package in the repositories and, the net-snmp install process does NOT create a separate low-privilege user account to run snmpd nor does it define in /usr/lib/systemd/system/snmpd.service an ExecStart with a -u or -g option for any other users or groups by default. As there is no low-privileged user created to escalate to root, it's notaffected.
Comment 4 Product Security DevOps Team 2020-08-04 01:27:42 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-15861
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