samba: DoS to AD-DC due to insufficient checking of asn1 memory allocation
Published Dec 29, 2015
7.5
HIGHCVSS 3.1
EPSS 7.12%
Description
The LDAP server in the AD domain controller in Samba 4.x before 4.1.22 does not check return values to ensure successful ASN.1 memory allocation, which allows remote attackers to cause a denial of service (memory consumption and daemon crash) via crafted packets.
Affected products
No data.
Configuration 2
- 12.04
- 14.04
- 15.04
- 15.10
Configuration 3
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 6
samba4-0:4.0.0-67.el6_7.rc4
Fixed · RHSA-2016:0010
Red Hat Enterprise Linux 7
samba-0:4.2.3-10.el7
Fixed · RHBA-2015:2258
Red Hat Gluster Storage 3.1 for RHEL 6
samba-0:4.1.17-16.el6rhs
Fixed · RHSA-2016:0015
Red Hat Enterprise Linux 5
samba
Not affected
Red Hat Enterprise Linux 5
samba3x
Not affected
Red Hat Enterprise Linux 6
samba
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | samba4-0:4.0.0-67.el6_7.rc4 | Fixed | RHSA-2016:0010 |
| Red Hat Enterprise Linux 7 | samba-0:4.2.3-10.el7 | Fixed | RHBA-2015:2258 |
| Red Hat Gluster Storage 3.1 for RHEL 6 | samba-0:4.1.17-16.el6rhs | Fixed | RHSA-2016:0015 |
| Red Hat Enterprise Linux 5 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 5 | samba3x | Not affected | n/a |
| Red Hat Enterprise Linux 6 | samba | 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
No CVSS v3.0 score for this CVE.
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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- 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 | 7.12% (0.07116) | 94.06th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.12% (0.07116) | 93.41th | v5 (v2026.06.15) |
| Jun 8, 2026 | 23.20% (0.23201) | 96.05th | v4 (v2025.03.14) |
| May 13, 2026 | 39.60% (0.39597) | 97.35th | v4 (v2025.03.14) |
| Dec 28, 2025 | 43.30% (0.43299) | 97.37th | v4 (v2025.03.14) |
| Dec 27, 2025 | 39.60% (0.39597) | 97.18th | v4 (v2025.03.14) |
| Nov 30, 2025 | 43.30% (0.43299) | 97.35th | v4 (v2025.03.14) |
| Oct 28, 2025 | 9.91% (0.09910) | 92.67th | v4 (v2025.03.14) |
| Oct 27, 2025 | 8.50% (0.08504) | 91.98th | v4 (v2025.03.14) |
| Oct 19, 2025 | 9.91% (0.09910) | 92.65th | v4 (v2025.03.14) |
| Aug 31, 2025 | 10.97% (0.10967) | 93.15th | v4 (v2025.03.14) |
| Aug 30, 2025 | 28.11% (0.28107) | 96.30th | v4 (v2025.03.14) |
| Jun 24, 2025 | 17.83% (0.17829) | 94.80th | v4 (v2025.03.14) |
| Mar 30, 2025 | 16.71% (0.16706) | 94.37th | v4 (v2025.03.14) |
| Mar 29, 2025 | 10.49% (0.10487) | 88.66th | v4 (v2025.03.14) |
| Mar 20, 2025 | 16.71% (0.16706) | 94.42th | v4 (v2025.03.14) |
| Mar 17, 2025 | 17.83% (0.17829) | 94.63th | v4 (v2025.03.14) |
| Dec 17, 2024 | 4.28% (0.04275) | 92.19th | v3 (v2023.03.01) |
| Nov 8, 2023 | 13.25% (0.13250) | 94.98th | v3 (v2023.03.01) |
| Mar 31, 2023 | 4.27% (0.04267) | 90.99th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.79% (0.03794) | 90.45th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.78% (0.03779) | 85.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.78% (0.03779) | 84.01th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.78% (0.03779) | 67.21th | v2 (v2022.01.01) |
References (17)
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.debian.org/security/2016/dsa-3433 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/79736 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1034492 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2855-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2855-2 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-7540 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1288451 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=530d50a1abdcdf4d1775652d4c456c1274d83d8d x_refsource_CONFIRM
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=9d989c9dd7a5b92d0c5d65287935471b83b6e884 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2015-7540
- https://security.gentoo.org/glsa/201612-47 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-7540
- https://www.samba.org/samba/security/CVE-2015-7540.html x_refsource_CONFIRMVendor Advisory
Change history (0)
No recorded changes yet.