curl: NTLM buffer overflow via integer overflow
Published Nov 29, 2017
9.8
CRITICALCVSS 3.1
EPSS 8.52%
Description
The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and resultant buffer overflow, and application crash) or possibly have unspecified other impact via vectors involving long user and password fields.
Affected products
- Vendor n/a Product Curl and Libcurl Before 7.57.0 Defaultn/a
- Version curl and libcurl before 7.57.0StatusaffectedConstraints-
- 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 and Libcurl Before 7.57.0 | n/a |
|
Configuration 1
Configuration 2
- 8.0
- 9.0
No data.
Red Hat Software Collections for Red Hat Enterprise Linux 6
httpd24-curl-0:7.61.1-1.el6
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 6
httpd24-httpd-0:2.4.34-7.el6
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 6
httpd24-nghttp2-0:1.7.1-7.el6
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7
httpd24-curl-0:7.61.1-1.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7
httpd24-httpd-0:2.4.34-7.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7
httpd24-nghttp2-0:1.7.1-7.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
httpd24-curl-0:7.61.1-1.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
httpd24-httpd-0:2.4.34-7.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
httpd24-nghttp2-0:1.7.1-7.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
httpd24-curl-0:7.61.1-1.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
httpd24-httpd-0:2.4.34-7.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
httpd24-nghttp2-0:1.7.1-7.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
httpd24-curl-0:7.61.1-1.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
httpd24-httpd-0:2.4.34-7.el7
Fixed · RHSA-2018:3558
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
httpd24-nghttp2-0:1.7.1-7.el7
Fixed · RHSA-2018:3558
.NET Core 1.0 on Red Hat Enterprise Linux
rh-dotnetcore10-curl
Out of support scope
.NET Core 1.1 on Red Hat Enterprise Linux
rh-dotnetcore11-curl
Out of support scope
.NET Core 2.0 on Red Hat Enterprise Linux
rh-dotnet20-curl
Out of support scope
.NET Core 2.1 on Red Hat Enterprise Linux
rh-dotnet21-curl
Will not fix
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 Linux 8
curl
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | httpd24-curl-0:7.61.1-1.el6 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | httpd24-httpd-0:2.4.34-7.el6 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | httpd24-nghttp2-0:1.7.1-7.el6 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | httpd24-curl-0:7.61.1-1.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | httpd24-httpd-0:2.4.34-7.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | httpd24-nghttp2-0:1.7.1-7.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS | httpd24-curl-0:7.61.1-1.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS | httpd24-httpd-0:2.4.34-7.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS | httpd24-nghttp2-0:1.7.1-7.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | httpd24-curl-0:7.61.1-1.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | httpd24-httpd-0:2.4.34-7.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | httpd24-nghttp2-0:1.7.1-7.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | httpd24-curl-0:7.61.1-1.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | httpd24-httpd-0:2.4.34-7.el7 | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | httpd24-nghttp2-0:1.7.1-7.el7 | Fixed | RHSA-2018:3558 |
| .NET Core 1.0 on Red Hat Enterprise Linux | rh-dotnetcore10-curl | Out of support scope | n/a |
| .NET Core 1.1 on Red Hat Enterprise Linux | rh-dotnetcore11-curl | Out of support scope | n/a |
| .NET Core 2.0 on Red Hat Enterprise Linux | rh-dotnet20-curl | Out of support scope | n/a |
| .NET Core 2.1 on Red Hat Enterprise Linux | rh-dotnet21-curl | Will not fix | 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 Linux 8 | 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.
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:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/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 Apr 15, 2026 · SSVC 2.0.3
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 | 8.52% (0.08523) | 94.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.52% (0.08523) | 94.33th | v5 (v2026.06.15) |
| Nov 21, 2025 | 0.61% (0.00611) | 68.98th | v4 (v2025.03.14) |
| Nov 18, 2025 | 9.62% (0.09624) | 92.06th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.65% (0.00650) | 68.43th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.91% (0.01907) | 72.28th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.67% (0.00668) | 69.58th | v4 (v2025.03.14) |
| Dec 17, 2024 | 5.21% (0.05206) | 92.89th | v3 (v2023.03.01) |
| Dec 12, 2024 | 4.00% (0.04002) | 92.39th | v3 (v2023.03.01) |
| Jul 19, 2023 | 3.66% (0.03659) | 90.46th | v3 (v2023.03.01) |
| Jun 25, 2023 | 4.32% (0.04317) | 91.09th | v3 (v2023.03.01) |
| Jun 1, 2023 | 5.99% (0.05988) | 92.35th | v3 (v2023.03.01) |
| May 8, 2023 | 7.71% (0.07706) | 93.16th | v3 (v2023.03.01) |
| Apr 22, 2023 | 4.71% (0.04709) | 91.41th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.32% (0.07321) | 92.98th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.18% (0.01183) | 61.76th | v2 (v2022.01.01) |
| Oct 19, 2022 | 1.18% (0.01183) | 60.79th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.18% (0.01183) | 58.77th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.18% (0.01183) | 35.15th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.31% (0.02314) | 53.75th | v1 |
| Jan 6, 2022 | 2.31% (0.02314) | 53.29th | v1 |
| Sep 1, 2021 | 2.31% (0.02314) | 78.25th | v1 |
| Apr 14, 2021 | 2.31% (0.02314) | 0.00th | v1 |
References (12)
- http://security.cucumberlinux.com/security/details.php?id=161 x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/101998 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039896 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040608 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/errata/RHSA-2018:3558 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2017-8816 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1515757 Issue Tracking
- https://curl.haxx.se/docs/adv_2017-12e7.html x_refsource_CONFIRMMitigationVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-8816
- https://security.gentoo.org/glsa/201712-04 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-8816
- https://www.debian.org/security/2017/dsa-4051 vendor-advisoryx_refsource_DEBIANThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://security.cucumberlinux.com/security/details.php?id=161 | x_refsource_CONFIRMThird Party Advisory | |
| http://www.securityfocus.com/bid/101998 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1039896 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040608 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/errata/RHSA-2018:3558 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2017-8816 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1515757 | Issue Tracking | |
| https://curl.haxx.se/docs/adv_2017-12e7.html | x_refsource_CONFIRMMitigationVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-8816 | ||
| https://security.gentoo.org/glsa/201712-04 | vendor-advisoryx_refsource_GENTOOThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2017-8816 | ||
| https://www.debian.org/security/2017/dsa-4051 | vendor-advisoryx_refsource_DEBIANThird Party Advisory |
Change history (0)
No recorded changes yet.