What is CVE-2016-5423?

CVE-2016-5423 is a high-severity vulnerability in Postgresql, classified under NULL Pointer Dereference. CVSS score: 8.3/10. Published 2016-12-09.

How severe is CVE-2016-5423?

High severity. CVSS v3 base score is 8.3 out of 10.

Is CVE-2016-5423 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Postgresql

CVE-2016-5423

PostgreSQL before 9.1.23, 9.2.x before 9.2.18, 9.3.x before 9.3.14, 9.4.x before 9.4.9, and 9.5.x before 9.5.4 allow remote authenticated users to cause a denial of service (NULL pointer dereference and server crash), obtain sensitive memory information, or possibly execute arbitrary code via (1) a CASE expression within the test value subexpression of another CASE or (2) inlining of an SQL function that implements the equality operator used for a CASE expression involving values of different types.

EPSS: 0.060 (92.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H.

Affected products

Postgresql — versions 9.2, 9.2.1, 9.2.2
Debian Debian_linux — versions 8.0
N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

References

secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_CONFIRM, Release Notes, Vendor Advisory)
secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
secalert@redhat.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
secalert@redhat.com (vendor-advisory, x_refsource_GENTOO)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_CONFIRM, Release Notes, Vendor Advisory)
secalert@redhat.com (x_refsource_CONFIRM, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2016-5423?: CVE-2016-5423 is a high-severity vulnerability in Postgresql, classified under NULL Pointer Dereference. CVSS score: 8.3/10. Published 2016-12-09.
How severe is CVE-2016-5423?: High severity. CVSS v3 base score is 8.3 out of 10.
Is CVE-2016-5423 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.