CVE-2020-15861
published 2020-08-20CVE-2020-15861: Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic link (symlink) following.
PriorityP338high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.46%
37.1th percentile
Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic link (symlink) following.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | net-snmp | < net-snmp 5.8+dfsg-5 (bookworm) | net-snmp 5.8+dfsg-5 (bookworm) |
| net-snmp | net-snmp | <= 5.7.3 | — |
| net-snmp | net-snmp | >= 0 < 5.8+dfsg-5 | 5.8+dfsg-5 |
| net-snmp | net-snmp | >= 0 < 5.8+dfsg-5 | 5.8+dfsg-5 |
| net-snmp | net-snmp | >= 0 < 5.8+dfsg-5 | 5.8+dfsg-5 |
| net-snmp | net-snmp | >= 0 < 5.8+dfsg-5 | 5.8+dfsg-5 |
| net-snmp | net-snmp | >= 0 < 5.7.3+dfsg-1ubuntu4.5 | 5.7.3+dfsg-1ubuntu4.5 |
| net-snmp | net-snmp | >= 0 < 5.7.3+dfsg-1ubuntu4.6 | 5.7.3+dfsg-1ubuntu4.6 |
| net-snmp | net-snmp | >= 0 < 5.7.3+dfsg-1.8ubuntu3.5 | 5.7.3+dfsg-1.8ubuntu3.5 |
| net-snmp | net-snmp | >= 0 < 5.7.3+dfsg-1.8ubuntu3.6 | 5.7.3+dfsg-1.8ubuntu3.6 |
| net-snmp | net-snmp | >= 0 < 5.8+dfsg-2ubuntu2.3 | 5.8+dfsg-2ubuntu2.3 |
| net-snmp | net-snmp | >= 0 < 5.7.2~dfsg-8.1ubuntu3.3+esm1 | 5.7.2~dfsg-8.1ubuntu3.3+esm1 |
| net-snmp | net-snmp | >= 0 < 5.7.2~dfsg-8.1ubuntu3.3+esm2 | 5.7.2~dfsg-8.1ubuntu3.3+esm2 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.2HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
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Ubuntu
Net-SNMP regression
vendor_ubuntu·2020-09-01·CVSS 7.8
CVE-2020-15861 [HIGH] Net-SNMP regression
Title: Net-SNMP regression
Summary: USN-4471-1 introduced a regression in Net-SNMP.
USN-4471-1 fixed a vulnerability in Net-SNMP. The updated introduced a regression making
nsExtendCacheTime not settable. This update fixes the problem adding the cacheTime feature flag.
Original advisory details:
Tobias Neitzel discovered that Net-SNMP incorrectly handled certain symlinks.
An attacker could possibly use this issue to access sensitive information.
(CVE-2020-15861)
It was discovered that Net-SNMP incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-15862)
Instructions: After a standard system update you need to restart snmpd t
Ubuntu
Net-SNMP vulnerabilities
vendor_ubuntu·2020-08-24·CVSS 7.8
CVE-2020-15861 [HIGH] Net-SNMP vulnerabilities
Title: Net-SNMP vulnerabilities
Summary: Several security issues were fixed in Net-SNMP.
Tobias Neitzel discovered that Net-SNMP incorrectly handled certain symlinks.
An attacker could possibly use this issue to access sensitive information.
(CVE-2020-15861)
It was discovered that Net-SNMP incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-15862)
Instructions: After a standard system update you need to restart snmpd to make
all the necessary changes.
Red Hat
net-snmp: combination with can lead to elevated permissions to root
vendor_redhat·2020-07-31·CVSS 7.8
CVE-2020-15861 [HIGH] CWE-266 net-snmp: combination with can lead to elevated permissions to root
net-snmp: combination with can lead to elevated permissions to root
Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic link (symlink) following.
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.
Package: net-snmp (Red Hat Enterprise Linux 5) - Not affected
Package: net-snmp (Red Hat Enterprise Linux 6) - Not affected
Package: net-
Debian
CVE-2020-15861: net-snmp - Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic ...
vendor_debian·2020·CVSS 7.8
CVE-2020-15861 [HIGH] CVE-2020-15861: net-snmp - Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic ...
Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic link (symlink) following.
Scope: local
bookworm: resolved (fixed in 5.8+dfsg-5)
bullseye: resolved (fixed in 5.8+dfsg-5)
forky: resolved (fixed in 5.8+dfsg-5)
sid: resolved (fixed in 5.8+dfsg-5)
trixie: resolved (fixed in 5.8+dfsg-5)
GHSA
GHSA-mfrp-422x-34qv: Net-SNMP through 5
ghsa_unreviewed·2022-05-24
CVE-2020-15861 [HIGH] CWE-59 GHSA-mfrp-422x-34qv: Net-SNMP through 5
Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic link (symlink) following.
OSV
net-snmp regression
osv·2020-09-01·CVSS 7.8
CVE-2020-15861 [HIGH] net-snmp regression
net-snmp regression
USN-4471-1 fixed a vulnerability in Net-SNMP. The updated introduced a regression making
nsExtendCacheTime not settable. This update fixes the problem adding the cacheTime feature flag.
Original advisory details:
Tobias Neitzel discovered that Net-SNMP incorrectly handled certain symlinks.
An attacker could possibly use this issue to access sensitive information.
(CVE-2020-15861)
It was discovered that Net-SNMP incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-15862)
OSV
net-snmp vulnerabilities
osv·2020-08-24·CVSS 7.8
CVE-2020-15861 [HIGH] net-snmp vulnerabilities
net-snmp vulnerabilities
Tobias Neitzel discovered that Net-SNMP incorrectly handled certain symlinks.
An attacker could possibly use this issue to access sensitive information.
(CVE-2020-15861)
It was discovered that Net-SNMP incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-15862)
OSV
CVE-2020-15861: Net-SNMP through 5
osv·2020-08-20·CVSS 7.8
CVE-2020-15861 [HIGH] CVE-2020-15861: Net-SNMP through 5
Net-SNMP through 5.7.3 allows Escalation of Privileges because of UNIX symbolic link (symlink) following.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-15861 net-snmp: combination with can lead to elevated permissions to root
bugzilla·2020-07-31·CVSS 7.8
CVE-2020-15861 [HIGH] CVE-2020-15861 net-snmp: combination with can lead to elevated permissions to root
CVE-2020-15861 net-snmp: combination with can lead to elevated permissions to root
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
Discussion:
Created net-snmp tracking bugs for this issue:
Affects: fedora-all [bug 1862470]
---
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 def
Bugzilla
CVE-2020-15861 net-snmp: combination with can lead to elevated permissions to root [fedora-all]
bugzilla·2020-07-31·CVSS 7.8
CVE-2020-15861 [HIGH] CVE-2020-15861 net-snmp: combination with can lead to elevated permissions to root [fedora-all]
CVE-2020-15861 net-snmp: combination with can lead to elevated permissions to root [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=966599https://github.com/net-snmp/net-snmp/commit/4fd9a450444a434a993bc72f7c3486ccce41f602https://github.com/net-snmp/net-snmp/issues/145https://security.gentoo.org/glsa/202008-12https://security.netapp.com/advisory/ntap-20200904-0001/https://usn.ubuntu.com/4471-1/https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=966599https://github.com/net-snmp/net-snmp/commit/4fd9a450444a434a993bc72f7c3486ccce41f602https://github.com/net-snmp/net-snmp/issues/145https://security.gentoo.org/glsa/202008-12https://security.netapp.com/advisory/ntap-20200904-0001/https://usn.ubuntu.com/4471-1/
2020-08-20
Published