Memory leak in the OBJ_obj2txt function in LibreSSL before 2.3.1 allows remote attackers to cause a denial of service (memory consumption) via a large number of ASN.1 object identifiers in X.509 certificates
Published Jan 23, 2020
7.5
HIGHCVSS 3.1
EPSS 1.98%
Description
Memory leak in the OBJ_obj2txt function in LibreSSL before 2.3.1 allows remote attackers to cause a denial of service (memory consumption) via a large number of ASN.1 object identifiers in X.509 certificates.
Affected products
-
- Version before 2.3.1StatusaffectedConstraints-
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.98% (0.01978) | 79.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.98% (0.01978) | 77.84th | v5 (v2026.06.15) |
| Jun 23, 2025 | 2.09% (0.02094) | 83.24th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.70% (0.00700) | 70.31th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.51% (0.00507) | 77.29th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.51% (0.00507) | 76.60th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.53% (0.00533) | 76.41th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.53% (0.00533) | 73.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (4)
- http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.3.1-relnotes.txt x_refsource_CONFIRMRelease NotesVendor Advisory
- http://lists.opensuse.org/opensuse-updates/2015-10/msg00050.html x_refsource_MISCMailing ListThird Party Advisory
- http://packetstormsecurity.com/files/133998/Qualys-Security-Advisory-LibreSSL-Leak-Overflow.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/archive/1/archive/1/536692/100/0/threaded x_refsource_MISCBroken Link
| Link | Providers | Tags |
|---|---|---|
| http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.3.1-relnotes.txt | x_refsource_CONFIRMRelease NotesVendor Advisory | |
| http://lists.opensuse.org/opensuse-updates/2015-10/msg00050.html | x_refsource_MISCMailing ListThird Party Advisory | |
| http://packetstormsecurity.com/files/133998/Qualys-Security-Advisory-LibreSSL-Leak-Overflow.html | x_refsource_MISCExploitThird Party AdvisoryVDB Entry | |
| http://www.securityfocus.com/archive/1/archive/1/536692/100/0/threaded | x_refsource_MISCBroken Link |
Change history (0)
No recorded changes yet.