In FreeBSD 11.3-PRERELEASE and 12.0-STABLE before r347591, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in the pf IPv6 fragment reassembly logic incorrectly uses the last extension header offset from the last received packet instead of the first packet allowing maliciously crafted IPv6 packets to cause a crash or potentially bypass the packet filter
Published May 15, 2019
9.1
CRITICALCVSS 3.0
EPSS 3.66%
Description
In FreeBSD 11.3-PRERELEASE and 12.0-STABLE before r347591, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in the pf IPv6 fragment reassembly logic incorrectly uses the last extension header offset from the last received packet instead of the first packet allowing maliciously crafted IPv6 packets to cause a crash or potentially bypass the packet filter.
Affected products
- Vendor n/a Product FreeBSD Defaultn/a
- Version FreeBSD 11.2 before 11.2-RELEASE-p10 and 12.0 before 12.0-RELEASE-p4StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | FreeBSD | n/a |
|
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.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
AV:N/AC:L/Au:N/C:N/I:P/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
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.66% (0.03658) | 89.26th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.63% (0.03628) | 88.02th | v5 (v2026.06.15) |
| Mar 30, 2025 | 2.20% (0.02202) | 82.95th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.34% (0.06337) | 84.53th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.25% (0.02246) | 83.41th | v4 (v2025.03.14) |
| Dec 17, 2024 | 7.40% (0.07398) | 94.04th | v3 (v2023.03.01) |
| Oct 5, 2024 | 6.13% (0.06134) | 93.69th | v3 (v2023.03.01) |
| Sep 13, 2024 | 7.40% (0.07404) | 94.23th | v3 (v2023.03.01) |
| Jun 12, 2024 | 13.64% (0.13639) | 95.65th | v3 (v2023.03.01) |
| May 8, 2024 | 13.54% (0.13545) | 95.58th | v3 (v2023.03.01) |
| Oct 11, 2023 | 11.11% (0.11112) | 94.51th | v3 (v2023.03.01) |
| Sep 8, 2023 | 11.60% (0.11598) | 94.57th | v3 (v2023.03.01) |
| Apr 21, 2023 | 8.54% (0.08537) | 93.46th | v3 (v2023.03.01) |
| Apr 5, 2023 | 7.58% (0.07575) | 93.10th | v3 (v2023.03.01) |
| Mar 7, 2023 | 5.49% (0.05494) | 91.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 23.17% (0.23171) | 94.67th | v2 (v2022.01.01) |
| Feb 3, 2022 | 6.21% (0.06208) | 81.93th | v1 |
| Jan 6, 2022 | 6.21% (0.06208) | 81.75th | v1 |
| Sep 1, 2021 | 1.45% (0.01454) | 71.88th | v1 |
| Apr 14, 2021 | 1.45% (0.01454) | 0.00th | v1 |
References (6)
- http://packetstormsecurity.com/files/152933/FreeBSD-Security-Advisory-FreeBSD-SA-19-05.pf.html x_refsource_MISCThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/108395 vdb-entryx_refsource_BID
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:05.pf.asc x_refsource_MISCPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20190611-0001/ x_refsource_CONFIRM
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html x_refsource_MISC
- https://www.synacktiv.com/ressources/Synacktiv_OpenBSD_PacketFilter_CVE-2019-5597_ipv6_frag.pdf x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/152933/FreeBSD-Security-Advisory-FreeBSD-SA-19-05.pf.html | x_refsource_MISCThird Party AdvisoryVDB Entry | |
| http://www.securityfocus.com/bid/108395 | vdb-entryx_refsource_BID | |
| https://security.FreeBSD.org/advisories/FreeBSD-SA-19:05.pf.asc | x_refsource_MISCPatchVendor Advisory | |
| https://security.netapp.com/advisory/ntap-20190611-0001/ | x_refsource_CONFIRM | |
| https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html | x_refsource_MISC | |
| https://www.synacktiv.com/ressources/Synacktiv_OpenBSD_PacketFilter_CVE-2019-5597_ipv6_frag.pdf | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.