6.5

CVE-2016-3120: mit kerberos_5 NULL Pointer Dereference

Modified
AliasesALPINE-CVE-2016-3120MGASA-2016-0306SUSE-SU-2016:2136-1
Published 01-08-2016Last modified 05-08-2024

Vulnerability summary

CVE-2016-3120 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in mit kerberos_5. EPSS estimates a 4.62% chance of exploitation in the next 30 days, higher than 91.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.0 (NVD)
EPSS score
4.62%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 1
DLA-1265-1OPENSUSE-SU-2024:10004-1RHSA-2016:2591

Timeline

  1. 01-08-2016
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

4.62%

Chance of exploitation in the next 30 days

Percentile

92%

Versus all other CVEs

30-day change

No change 0.00 pp

From 4.62% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse4 products
  • krb5&distro=SUSE Linux Enterprise Desktop 12 SP1< 1.12.1-36.4
  • krb5&distro=SUSE Linux Enterprise Server 12 SP1< 1.12.1-36.4
  • krb5&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP1< 1.12.1-36.4
  • krb5&distro=SUSE Linux Enterprise Software Development Kit 12 SP1< 1.12.1-36.4
Alpine1 product
  • krb5< 1.13.6-r0 | < 1.14.3-r0
Debian1 product
  • krb5< 1.14.3+dfsg-1
Mageia1 product
  • krb5< 1.12.5-1.1.mga5
Mit1 product
  • kerberos_51.13 | 1.13.1 | 1.13.2 | 1.13.3 | 1.13.4 | 1.13.5 | 1.13.6 | 1.14 | 1.14.1 | 1.14.2
Ubuntu1 product
  • krb5< 1.12+dfsg-2ubuntu5.4 | < 1.13.2+dfsg-5ubuntu2.1

6 vendors · 9 products

References

20 links
Show all 20 references