HIGH
krb5: ASN.1 decoder can free uninitialized pointer when decoding an invalid encoding (MITKRB5-SA-2009-002)
Published Apr 9, 2009
10.0
HIGHCVSS 2.0
EPSS 8.90%
Description
The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer.
Affected products
No data.
Configuration 1
- < 1.6.4
Configuration 2
OR
- 9
- 10
Configuration 3
OR
- 6.06
- 7.10
- 8.04
- 8.10
Configuration 5
OR
- 4.0
- 3.0
- 4.0
- 4.7
- 2.0
- 3.0
- 4.0
- 2.0
- 3.0
- 4.0
No data.
Red Hat Enterprise Linux 2.1
krb5-0:1.2.2-49
Fixed · RHSA-2009:0410
Red Hat Enterprise Linux 3
krb5-0:1.2.7-70
Fixed · RHSA-2009:0410
Red Hat Enterprise Linux 4
krb5-0:1.3.4-60.el4_7.2
Fixed · RHSA-2009:0409
Red Hat Enterprise Linux 5
krb5-0:1.6.1-31.el5_3.3
Fixed · RHSA-2009:0408
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 2.1 | krb5-0:1.2.2-49 | Fixed | RHSA-2009:0410 |
| Red Hat Enterprise Linux 3 | krb5-0:1.2.7-70 | Fixed | RHSA-2009:0410 |
| Red Hat Enterprise Linux 4 | krb5-0:1.3.4-60.el4_7.2 | Fixed | RHSA-2009:0409 |
| Red Hat Enterprise Linux 5 | krb5-0:1.6.1-31.el5_3.3 | Fixed | RHSA-2009:0408 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
10.0 HIGH NVD
AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
8.90% 0.08898
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.08898
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (31 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 8.90% (0.08898) | 95.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.90% (0.08898) | 94.55th | v5 (v2026.06.15) |
| Jun 13, 2026 | 51.90% (0.51898) | 97.97th | v4 (v2025.03.14) |
| Apr 9, 2026 | 50.01% (0.50005) | 97.82th | v4 (v2025.03.14) |
| Feb 5, 2026 | 56.35% (0.56355) | 98.04th | v4 (v2025.03.14) |
| Jan 23, 2026 | 58.07% (0.58073) | 98.11th | v4 (v2025.03.14) |
| Jan 18, 2026 | 54.68% (0.54678) | 97.95th | v4 (v2025.03.14) |
| Dec 23, 2025 | 56.35% (0.56355) | 98.00th | v4 (v2025.03.14) |
| Dec 1, 2025 | 50.18% (0.50177) | 97.71th | v4 (v2025.03.14) |
| Nov 9, 2025 | 41.01% (0.41014) | 97.21th | v4 (v2025.03.14) |
| Oct 26, 2025 | 25.31% (0.25310) | 95.93th | v4 (v2025.03.14) |
| Mar 30, 2025 | 23.59% (0.23588) | 95.51th | v4 (v2025.03.14) |
| Mar 29, 2025 | 31.90% (0.31898) | 94.99th | v4 (v2025.03.14) |
| Mar 21, 2025 | 23.59% (0.23588) | 95.54th | v4 (v2025.03.14) |
| Mar 19, 2025 | 35.55% (0.35547) | 96.57th | v4 (v2025.03.14) |
| Mar 17, 2025 | 42.58% (0.42583) | 97.16th | v4 (v2025.03.14) |
| Dec 17, 2024 | 88.54% (0.88536) | 98.95th | v3 (v2023.03.01) |
| Nov 23, 2024 | 64.59% (0.64592) | 97.99th | v3 (v2023.03.01) |
| Aug 6, 2024 | 62.53% (0.62529) | 97.89th | v3 (v2023.03.01) |
| Jul 3, 2024 | 60.55% (0.60549) | 97.81th | v3 (v2023.03.01) |
| May 29, 2024 | 61.66% (0.61657) | 97.81th | v3 (v2023.03.01) |
| Mar 16, 2024 | 62.12% (0.62122) | 97.74th | v3 (v2023.03.01) |
| Feb 9, 2024 | 58.20% (0.58204) | 97.61th | v3 (v2023.03.01) |
| Dec 28, 2023 | 93.47% (0.93466) | 98.89th | v3 (v2023.03.01) |
| Nov 17, 2023 | 92.38% (0.92376) | 98.72th | v3 (v2023.03.01) |
| Oct 7, 2023 | 93.17% (0.93171) | 98.75th | v3 (v2023.03.01) |
| Jul 12, 2023 | 94.80% (0.94805) | 98.90th | v3 (v2023.03.01) |
| Mar 7, 2023 | 95.37% (0.95368) | 98.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 8.23% (0.08228) | 93.49th | v2 (v2022.01.01) |
| Apr 1, 2022 | 8.23% (0.08228) | 92.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.23% (0.08228) | 82.23th | v2 (v2022.01.01) |
References (54)
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Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Apr 9, 2009
Updated Aug 7, 2024
Reserved Mar 6, 2009
Link CVE-2009-0846
CISA Vulnrichment
Updated n/a