The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.
Published 2009-10-30 20:30:00
Updated 2023-02-13 01:17:48
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionBypassGain privilegeDenial of service

Products affected by CVE-2009-3623

Threat overview for CVE-2009-3623

Top countries where our scanners detected CVE-2009-3623
Top open port discovered on systems with this issue 52869
IPs affected by CVE-2009-3623 235,060
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2009-3623!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2009-3623

4.35%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 91 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2009-3623

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.8
HIGH AV:N/AC:L/Au:N/C:N/I:N/A:C
10.0
6.9
NIST

CWE ids for CVE-2009-3623

  • When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
    Assigned by: nvd@nist.gov (Primary)

Vendor statements for CVE-2009-3623

  • Red Hat 2009-11-02
    Not vulnerable. This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, 5, or Red Hat Enterprise MRG. Those versions do not include the upstream patch that introduced this vulnerability.
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