openldap: contrib/slapd-modules/nops/nops.c attempts to free stack buffer allowing remote attackers to cause a denial of service
Published Dec 18, 2017
7.5
HIGHCVSS 3.1
EPSS 7.02%
Description
contrib/slapd-modules/nops/nops.c in OpenLDAP through 2.4.45, when both the nops module and the memberof overlay are enabled, attempts to free a buffer that was allocated on the stack, which allows remote attackers to cause a denial of service (slapd crash) via a member MODDN operation.
Affected products
No data.
Configuration 3
- < 21.1.2
Configuration 4
- < 6.5.1
No data.
Red Hat Enterprise Linux 5
openldap
Not affected
Red Hat Enterprise Linux 5
openldap24-libs
Not affected
Red Hat Enterprise Linux 6
compat-openldap
Not affected
Red Hat Enterprise Linux 6
openldap
Not affected
Red Hat Enterprise Linux 7
compat-openldap
Not affected
Red Hat Enterprise Linux 7
openldap
Not affected
Red Hat Enterprise Linux 8
openldap
Not affected
Red Hat JBoss Core Services
openldap
Not affected
Red Hat JBoss Enterprise Application Platform 5
openldap
Will not fix
Red Hat JBoss Enterprise Web Server 2
openldap
Not affected
Red Hat JBoss Web Server 3
openldap
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | openldap | Not affected | n/a |
| Red Hat Enterprise Linux 5 | openldap24-libs | Not affected | n/a |
| Red Hat Enterprise Linux 6 | compat-openldap | Not affected | n/a |
| Red Hat Enterprise Linux 6 | openldap | Not affected | n/a |
| Red Hat Enterprise Linux 7 | compat-openldap | Not affected | n/a |
| Red Hat Enterprise Linux 7 | openldap | Not affected | n/a |
| Red Hat Enterprise Linux 8 | openldap | Not affected | n/a |
| Red Hat JBoss Core Services | openldap | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 5 | openldap | Will not fix | n/a |
| Red Hat JBoss Enterprise Web Server 2 | openldap | Not affected | n/a |
| Red Hat JBoss Web Server 3 | openldap | 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:N/I:N/A:H
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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
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 (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.02% (0.07022) | 93.98th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.02% (0.07022) | 93.33th | v5 (v2026.06.15) |
| Mar 28, 2026 | 6.70% (0.06703) | 91.20th | v4 (v2025.03.14) |
| Mar 21, 2026 | 4.18% (0.04176) | 88.59th | v4 (v2025.03.14) |
| Mar 5, 2026 | 2.87% (0.02871) | 86.06th | v4 (v2025.03.14) |
| Nov 23, 2025 | 1.64% (0.01643) | 81.39th | v4 (v2025.03.14) |
| Jun 14, 2025 | 2.84% (0.02838) | 85.53th | v4 (v2025.03.14) |
| Apr 21, 2025 | 1.64% (0.01643) | 80.91th | v4 (v2025.03.14) |
| Mar 30, 2025 | 5.76% (0.05765) | 89.54th | v4 (v2025.03.14) |
| Mar 29, 2025 | 14.74% (0.14739) | 90.86th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.32% (0.05322) | 89.34th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.41% (0.00407) | 74.01th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.41% (0.00407) | 73.11th | v3 (v2023.03.01) |
| May 11, 2023 | 0.41% (0.00407) | 69.96th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.31% (0.00314) | 65.48th | 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) |
| Feb 3, 2022 | 1.62% (0.01623) | 33.90th | v1 |
| Jan 6, 2022 | 1.62% (0.01623) | 33.20th | v1 |
| Sep 1, 2021 | 1.62% (0.01623) | 73.32th | v1 |
| Jul 31, 2021 | 1.62% (0.01623) | 0.00th | v1 |
| Apr 14, 2021 | 1.30% (0.01300) | 0.00th | v1 |
References (9)
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.openldap.org/its/index.cgi/Incoming?id=8759 x_refsource_MISCIssue TrackingVendor Advisory
- https://access.redhat.com/security/cve/CVE-2017-17740 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1527076 Issue Tracking
- https://kc.mcafee.com/corporate/index?page=content&id=SB10365 x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-17740
- https://www.cve.org/CVERecord?id=CVE-2017-17740
- https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISCPatchThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html | vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory | |
| http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html | vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory | |
| http://www.openldap.org/its/index.cgi/Incoming?id=8759 | x_refsource_MISCIssue TrackingVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2017-17740 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1527076 | Issue Tracking | |
| https://kc.mcafee.com/corporate/index?page=content&id=SB10365 | x_refsource_CONFIRMThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-17740 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-17740 | ||
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISCPatchThird Party Advisory |
Change history (0)
No recorded changes yet.