ppp: Remote client crash in ppp EAP-TLS patch
Published Jun 14, 2018
9.8
CRITICALCVSS 3.1
EPSS 1.90%
Description
Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the `refuse-app` option are unaffected.
Affected products
No data.
Configuration 1
- < 2.4.9
Configuration 2
- 14.04
- 16.04
- 18.04
No data.
Red Hat Enterprise Linux 5
ppp
Not affected
Red Hat Enterprise Linux 6
ppp
Not affected
Red Hat Enterprise Linux 7
ppp
Will not fix
Red Hat Enterprise Linux 8
ppp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | ppp | Not affected | n/a |
| Red Hat Enterprise Linux 6 | ppp | Not affected | n/a |
| Red Hat Enterprise Linux 7 | ppp | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | ppp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
PPP instances must be configured for EAP-TLS authentication to expose this vulnerability. For ppp servers, the file `/etc/ppp/eaptls-server' must exist. For clients, either `/etc/ppp/eaptls-client` must exist or command-line options `ca`, `cert` and `key` must be provided.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Dec 3, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.90% (0.01899) | 78.95th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.90% (0.01899) | 76.90th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.21% (0.00206) | 58.98th | v3 (v2023.03.01) |
| Nov 5, 2023 | 0.21% (0.00206) | 58.39th | v3 (v2023.03.01) |
| Sep 12, 2023 | 0.18% (0.00184) | 55.05th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.23% (0.00229) | 60.00th | v3 (v2023.03.01) |
| May 8, 2023 | 0.16% (0.00162) | 51.32th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.23% (0.00229) | 59.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.62% (0.00624) | 17.80th | v1 |
| Jan 6, 2022 | 0.62% (0.00624) | 17.24th | v1 |
| Sep 1, 2021 | 0.62% (0.00624) | 45.04th | v1 |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (6)
- http://www.openwall.com/lists/oss-security/2018/06/11/1 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-11574 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1586071 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-11574
- https://usn.ubuntu.com/3810-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-11574
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2018/06/11/1 | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2018-11574 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1586071 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-11574 | ||
| https://usn.ubuntu.com/3810-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-11574 |
Change history (0)
No recorded changes yet.