CVE-2021-42550

Published on: Not Yet Published

Last Modified on: 12/29/2021 09:15:00 PM UTC

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Certain versions of Logback from Qos contain the following vulnerability:

In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files could craft a malicious configuration allowing to execute arbitrary code loaded from LDAP servers.

  • CVE-2021-42550 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • Affected Vendor/Software: URL Logo QOS.ch - logback version < 1.2.9
  • Affected Vendor/Software: URL Logo QOS.ch - logback version < 1.3.0-alpha11

CVSS3 Score: 6.6 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK HIGH HIGH NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED HIGH HIGH HIGH

CVSS2 Score: 8.5 - HIGH

Access
Vector
Access
Complexity
Authentication
NETWORK MEDIUM SINGLE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
COMPLETE COMPLETE COMPLETE

CVE References

Description Tags Link
[LOGBACK-1591] Possibility of vulnerability - QOS.ch JIRA jira.qos.ch
text/html
URL Logo MISC jira.qos.ch/browse/LOGBACK-1591
CVE-2021-42550 Logback Vulnerability in NetApp Products | NetApp Product Security security.netapp.com
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URL Logo CONFIRM security.netapp.com/advisory/ntap-20211229-0001/
GitHub - cn-panda/logbackRceDemo: The project is a simple vulnerability Demo environment written by SpringBoot. Here, I deliberately wrote a vulnerability environment where there are arbitrary file uploads, and then use the `scan` attribute in the loghack configuration file to cooperate with the logback vulnerability to implement RCE. github.com
text/html
URL Logo MISC github.com/cn-panda/logbackRceDemo
Logback News logback.qos.ch
text/html
URL Logo CONFIRM logback.qos.ch/news.html

Exploit/POC from Github

Fastest filesystem scanner for CVE-2021-44228 and CVE-2021-45046 vulnerable instances of log4j library, including emb…

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationQosLogback1.3.0alpha0AllAll
ApplicationQosLogback1.3.0alpha1AllAll
ApplicationQosLogback1.3.0alpha10AllAll
ApplicationQosLogback1.3.0alpha2AllAll
ApplicationQosLogback1.3.0alpha3AllAll
ApplicationQosLogback1.3.0alpha4AllAll
ApplicationQosLogback1.3.0alpha5AllAll
ApplicationQosLogback1.3.0alpha6AllAll
ApplicationQosLogback1.3.0alpha7AllAll
ApplicationQosLogback1.3.0alpha8AllAll
ApplicationQosLogback1.3.0alpha9AllAll
ApplicationQosLogbackAllAllAllAll
ApplicationRedhatSatellite6.0AllAllAll
  • cpe:2.3:a:qos:logback:1.3.0:alpha0:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha1:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha10:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha2:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha3:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha4:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha5:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha6:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha7:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha8:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:1.3.0:alpha9:*:*:*:*:*:*:
  • cpe:2.3:a:qos:logback:*:*:*:*:*:*:*:*:
  • cpe:2.3:a:redhat:satellite:6.0:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-42550 : In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit conf… twitter.com/i/web/status/1… 2021-12-16 18:25:35
Reddit Logo Icon /r/netcve CVE-2021-42550 2021-12-16 19:38:33
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