PT-2021-4052 · Unknown · Shibboleth Service Provider

Ferenc Wágner + 1 · Published 2021-04-22 · Updated 2021-05-07 · CVE-2021-31826

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Shibboleth Service Provider versions 3.x through 3.2.1

Description The issue involves a NULL pointer dereference flaw in the session recovery feature of the Shibboleth Service Provider. This flaw can be exploited to cause a daemon crash on systems not using the session recovery feature by supplying a crafted cookie. The exploitation of this flaw can allow a remote attacker to cause a denial of service.

Recommendations For Shibboleth Service Provider versions 3.x through 3.2.1, update to version 3.2.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the session recovery feature until a patch is available.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2021-04580

CVE-2021-31826

DSA-4905-1

Affected Products

Shibboleth Service Provider

References · 18

• 🔥 https://issues.shibboleth.net/jira/browse/SSPCPP-927 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-31826 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-31826 · Vendor Advisory
• https://shibboleth.net/community/advisories/secadv_20210426.txt · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-31826 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04580 · Security Note
• https://osv.dev/vulnerability/CVE-2021-31826 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4905-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31826 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-31826 · Vendor Advisory
• https://debian.org/security/2021/dsa-4905 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-31826 · Security Note
• https://bugs.debian.org/987608 · Note
• https://t.me/cvenotify/13767 · Telegram Post
• https://t.me/cvenotify/14282 · Telegram Post