7.5
HIGH
CVE-2021-31826
Shibboleth Service Provider Null Pointer Dereference Vulnerability
Description

Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.

INFO

Published Date :

April 27, 2021, 4:15 a.m.

Last Modified :

Nov. 7, 2023, 3:35 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-31826 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Shibboleth service_provider
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-31826.

URL Resource
https://bugs.debian.org/987608 Mailing List Third Party Advisory
https://git.shibboleth.net/view/?p=cpp-sp.git%3Ba=commit%3Bh=5a47c3b9378f4c49392dd4d15189b70956f9f2ec
https://issues.shibboleth.net/jira/browse/SSPCPP-927 Exploit Patch Vendor Advisory
https://shibboleth.net/community/advisories/secadv_20210426.txt Vendor Advisory
https://www.debian.org/security/2021/dsa-4905 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-31826 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-31826 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://git.shibboleth.net/view/?p=cpp-sp.git%3Ba=commit%3Bh=5a47c3b9378f4c49392dd4d15189b70956f9f2ec [No types assigned]
    Removed Reference MITRE https://git.shibboleth.net/view/?p=cpp-sp.git;a=commit;h=5a47c3b9378f4c49392dd4d15189b70956f9f2ec
  • Initial Analysis by [email protected]

    May. 07, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://bugs.debian.org/987608 No Types Assigned https://bugs.debian.org/987608 Mailing List, Third Party Advisory
    Changed Reference Type https://git.shibboleth.net/view/?p=cpp-sp.git;a=commit;h=5a47c3b9378f4c49392dd4d15189b70956f9f2ec No Types Assigned https://git.shibboleth.net/view/?p=cpp-sp.git;a=commit;h=5a47c3b9378f4c49392dd4d15189b70956f9f2ec Mailing List, Vendor Advisory
    Changed Reference Type https://issues.shibboleth.net/jira/browse/SSPCPP-927 No Types Assigned https://issues.shibboleth.net/jira/browse/SSPCPP-927 Exploit, Patch, Vendor Advisory
    Changed Reference Type https://shibboleth.net/community/advisories/secadv_20210426.txt No Types Assigned https://shibboleth.net/community/advisories/secadv_20210426.txt Vendor Advisory
    Changed Reference Type https://www.debian.org/security/2021/dsa-4905 No Types Assigned https://www.debian.org/security/2021/dsa-4905 Third Party Advisory
    Added CWE NIST CWE-476
    Added CPE Configuration OR *cpe:2.3:a:shibboleth:service_provider:*:*:*:*:*:*:*:* versions from (including) 3.0.0 up to (excluding) 3.2.2
  • CVE Modified by [email protected]

    Apr. 28, 2021

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2021/dsa-4905 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-31826 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-31826 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.25 }} 0.03%

score

0.62788

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability