CVE-2021-3882

Published on: 10/14/2021 12:00:00 AM UTC

Last Modified on: 10/20/2021 06:02:00 PM UTC

CVE-2021-3882 - advisory for 7061d97a-98a5-495a-8ba0-3a4c66091e9d

Source: Mitre Source: Nist Print: PDF PDF
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N

Certain versions of Ledgersmb from Ledgersmb contain the following vulnerability:

LedgerSMB does not set the 'Secure' attribute on the session authorization cookie when the client uses HTTPS and the LedgerSMB server is behind a reverse proxy. By tricking a user to use an unencrypted connection (HTTP), an attacker may be able to obtain the authentication data by capturing network traffic. LedgerSMB 1.8 and newer switched from Basic authentication to using cookie authentication with encrypted cookies. Although an attacker can't access the information inside the cookie, nor the password of the user, possession of the cookie is enough to access the application as the user from which the cookie has been obtained. In order for the attacker to obtain the cookie, first of all the server must be configured to respond to unencrypted requests, the attacker must be suitably positioned to eavesdrop on the network traffic between the client and the server *and* the user must be tricked into using unencrypted HTTP traffic. Proper audit control and separation of duties limit Integrity impact of the attack vector. Users of LedgerSMB 1.8 are urged to upgrade to known-fixed versions. Users of LedgerSMB 1.7 or 1.9 are unaffected by this vulnerability and don't need to take action. As a workaround, users may configure their Apache or Nginx reverse proxy to add the Secure attribute at the network boundary instead of relying on LedgerSMB. For Apache, please refer to the 'Header always edit' configuration command in the mod_headers module. For Nginx, please refer to the 'proxy_cookie_flags' configuration command.

  • CVE-2021-3882 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • Affected Vendor/Software: URL Logo ledgersmb - ledgersmb/ledgersmb version >= 1.8.0
  • Affected Vendor/Software: URL Logo ledgersmb - ledgersmb/ledgersmb version <= 1.8.21

CVSS3 Score: 6.8 - MEDIUM

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

CVSS2 Score: 4 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK HIGH NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL PARTIAL NONE

CVE References

Description Tags Link
Page not found | LedgerSMB ledgersmb.org
text/html
Inactive LinkNot Archived
URL Logo MISC ledgersmb.org/cve-2021-3882-sensitive-non-secure-cookie
Use HTTPS environment setting to detect https connections · ledgersmb/[email protected] · GitHub github.com
text/html
URL Logo MISC github.com/ledgersmb/ledgersmb/commit/c242f5a2abf4b99b0da205473cbba034f306bfe2
huntr: Disclose & Fix Security Vulnerabilities in Open Source huntr.dev
text/html
Inactive LinkNot Archived
URL Logo CONFIRM huntr.dev/bounties/7061d97a-98a5-495a-8ba0-3a4c66091e9d

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationLedgersmbLedgersmb1.8.0-AllAll
  • cpe:2.3:a:ledgersmb:ledgersmb:1.8.0:-:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-3882 : LedgerSMB does not set the 'Secure' attribute on the session authorization cookie when the client u… twitter.com/i/web/status/1… 2021-10-14 08:24:44
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