curl: TLS session resumption client cert bypass
Published Jul 16, 2018
7.5
HIGHCVSS 3.0
EPSS 1.65%
Description
In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.
Affected products
- Vendor n/a Product Curl Defaultn/a
- Version curl 7.54.0StatusaffectedConstraints-
- 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 | Curl | n/a |
|
No data.
.NET Core 1.0 on Red Hat Enterprise Linux
rh-dotnetcore10-curl
Not affected
.NET Core 1.1 on Red Hat Enterprise Linux
rh-dotnetcore11-curl
Not affected
.NET Core 2.0 on Red Hat Enterprise Linux
rh-dotnet20-curl
Not affected
Red Hat Enterprise Linux 5
curl
Not affected
Red Hat Enterprise Linux 6
curl
Not affected
Red Hat Enterprise Linux 7
curl
Not affected
Red Hat Enterprise Virtualization 3
mingw-virt-viewer
Not affected
Red Hat JBoss Enterprise Web Server 3
curl
Not affected
Red Hat Software Collections
httpd24-curl
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| .NET Core 1.0 on Red Hat Enterprise Linux | rh-dotnetcore10-curl | Not affected | n/a |
| .NET Core 1.1 on Red Hat Enterprise Linux | rh-dotnetcore11-curl | Not affected | n/a |
| .NET Core 2.0 on Red Hat Enterprise Linux | rh-dotnet20-curl | Not affected | n/a |
| Red Hat Enterprise Linux 5 | curl | Not affected | n/a |
| Red Hat Enterprise Linux 6 | curl | Not affected | n/a |
| Red Hat Enterprise Linux 7 | curl | Not affected | n/a |
| Red Hat Enterprise Virtualization 3 | mingw-virt-viewer | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 3 | curl | Not affected | n/a |
| Red Hat Software Collections | httpd24-curl | Not affected | n/a |
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:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
AV:N/AC:L/Au:N/C:N/I:P/A:N
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 v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.65% (0.01651) | 75.66th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.86% (0.01862) | 76.44th | v5 (v2026.06.15) |
| Nov 18, 2025 | 0.21% (0.00210) | 39.19th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.46% (0.00459) | 75.59th | v3 (v2023.03.01) |
| Feb 15, 2024 | 0.46% (0.00459) | 74.62th | v3 (v2023.03.01) |
| Jan 16, 2024 | 0.46% (0.00459) | 72.62th | v3 (v2023.03.01) |
| Dec 7, 2023 | 0.43% (0.00427) | 71.52th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.48% (0.00480) | 72.81th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.61% (0.00611) | 75.36th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.25% (0.01247) | 30.57th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
References (9)
- http://www.securityfocus.com/bid/97962 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038341 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-7468 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1443381 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://curl.haxx.se/docs/adv_20170419.html x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-7468
- https://security.gentoo.org/glsa/201709-14 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-7468
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/97962 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1038341 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2017-7468 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1443381 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://curl.haxx.se/docs/adv_20170419.html | x_refsource_CONFIRMVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-7468 | ||
| https://security.gentoo.org/glsa/201709-14 | vendor-advisoryx_refsource_GENTOOThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2017-7468 |
Change history (0)
No recorded changes yet.