samba: insecure "wide links" default
Published Mar 9, 2010
3.5
LOWCVSS 2.0
EPSS 30.43%
Description
The default configuration of smbd in Samba before 3.3.11, 3.4.x before 3.4.6, and 3.5.x before 3.5.0rc3, when a writable share exists, allows remote authenticated users to leverage a directory traversal vulnerability, and access arbitrary files, by using the symlink command in smbclient to create a symlink containing .. (dot dot) sequences, related to the combination of the unix extensions and wide links options.
Affected products
No data.
- 3.3.0
- 3.3.1
- 3.3.2
- 3.3.3
- 3.3.4
- 3.3.5
- 3.3.6
- 3.3.7
- 3.3.8
- 3.3.9
- 3.3.10
- 3.4.0
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 3.4.5
- 3.5.0
No data.
Red Hat Enterprise Linux 5
samba-0:3.0.33-3.37.el5
Fixed · RHSA-2012:0313
Red Hat Enterprise Linux 4
samba
Will not fix
Red Hat Enterprise Linux 5
samba3x
Not affected
Red Hat Enterprise Linux 6
samba
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | samba-0:3.0.33-3.37.el5 | Fixed | RHSA-2012:0313 |
| Red Hat Enterprise Linux 4 | samba | Will not fix | 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
Red Hat statement
This issue was addressed in Samba packages in Red Hat Enterprise Linux 5. It did not affect Samba packages in Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this issue as having low security impact. There is no plan to address this flaw in Red Hat Enterprise Linux 4. To prevent this issue, disable "wide links" or "unix extensions" in the Samba configuration file (/etc/samba/smb.conf) and restart smbd (service smb restart). Disabled "wide links" ensure that remote Samba clients will not have wide symbolic links (links pointing outside of the shared directory) resolved on the server side when processing requests from a client that does not support UNIX extensions. Disabled "unix extensions" prevents creation of wide links by malicious clients which support UNIX extensions. For further information, please view http://www.samba.org/samba/news/symlink_attack.html
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:S/C:P/I:N/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 3, 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 (25 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 30.43% (0.30431) | 98.19th | v5 (v2026.06.15) |
| Jun 15, 2026 | 30.31% (0.30310) | 97.98th | v5 (v2026.06.15) |
| May 22, 2026 | 56.31% (0.56307) | 98.15th | v4 (v2025.03.14) |
| Apr 12, 2026 | 52.41% (0.52408) | 97.93th | v4 (v2025.03.14) |
| Dec 1, 2025 | 29.36% (0.29358) | 96.43th | v4 (v2025.03.14) |
| Jul 31, 2025 | 27.49% (0.27491) | 96.22th | v4 (v2025.03.14) |
| Jul 12, 2025 | 38.23% (0.38234) | 97.06th | v4 (v2025.03.14) |
| Apr 28, 2025 | 37.09% (0.37086) | 96.91th | v4 (v2025.03.14) |
| Apr 12, 2025 | 39.34% (0.39335) | 97.02th | v4 (v2025.03.14) |
| Mar 25, 2025 | 45.69% (0.45694) | 97.34th | v4 (v2025.03.14) |
| Mar 21, 2025 | 41.63% (0.41625) | 97.16th | v4 (v2025.03.14) |
| Mar 17, 2025 | 43.40% (0.43398) | 97.20th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.87% (0.02873) | 91.11th | v3 (v2023.03.01) |
| Jun 11, 2024 | 3.07% (0.03072) | 91.02th | v3 (v2023.03.01) |
| Apr 26, 2024 | 2.37% (0.02373) | 89.69th | v3 (v2023.03.01) |
| Jan 26, 2024 | 2.26% (0.02264) | 88.51th | v3 (v2023.03.01) |
| Dec 13, 2023 | 2.00% (0.02001) | 87.57th | v3 (v2023.03.01) |
| Oct 31, 2023 | 2.39% (0.02386) | 88.68th | v3 (v2023.03.01) |
| Sep 18, 2023 | 2.32% (0.02324) | 88.42th | v3 (v2023.03.01) |
| Aug 5, 2023 | 2.22% (0.02223) | 88.04th | v3 (v2023.03.01) |
| Jun 23, 2023 | 2.79% (0.02785) | 89.15th | v3 (v2023.03.01) |
| Mar 26, 2023 | 1.98% (0.01983) | 86.97th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.25% (0.02255) | 87.82th | v3 (v2023.03.01) |
| Mar 6, 2023 | 55.83% (0.55833) | 98.82th | v2 (v2022.01.01) |
| Feb 4, 2022 | 55.83% (0.55833) | 98.48th | v2 (v2022.01.01) |
References (38)
- http://archives.neohapsis.com/archives/fulldisclosure/2010-02/0083.html mailing-listx_refsource_FULLDISC
- http://archives.neohapsis.com/archives/fulldisclosure/2010-02/0107.html mailing-listx_refsource_FULLDISC
- http://archives.neohapsis.com/archives/fulldisclosure/2010-02/0108.html mailing-listx_refsource_FULLDISC
- http://blog.metasploit.com/2010/02/exploiting-samba-symlink-traversal.html x_refsource_MISC
- http://gitweb.samba.org/?p=samba.git%3Ba=commit%3Bh=bd269443e311d96ef495a9db47d1b95eb83bb8f4 x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2010-04/msg00001.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html vendor-advisoryx_refsource_SUSE
- http://marc.info/?l=full-disclosure&m=126538598820903&w=2 mailing-listx_refsource_FULLDISC
- http://marc.info/?l=oss-security&m=126539592603079&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=oss-security&m=126540402215620&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=oss-security&m=126540733320471&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=oss-security&m=126545363428745&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=oss-security&m=126777580624790&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126539387432412&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540011609753&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540100511357&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540248613395&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540277713815&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540290614053&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540376915283&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540475116511&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540477016522&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540539117328&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540608318301&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126540695819735&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126547903723628&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126548356728379&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126549111204428&w=2 mailing-listx_refsource_MLIST
- http://marc.info/?l=samba-technical&m=126555346721629&w=2 mailing-listx_refsource_MLIST
- http://secunia.com/advisories/39317 third-party-advisoryx_refsource_SECUNIA
- http://www.openwall.com/lists/oss-security/2010/02/06/3 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2010/03/05/3 mailing-listx_refsource_MLIST
- http://www.samba.org/samba/news/symlink_attack.html x_refsource_CONFIRMVendor Advisory
- https://access.redhat.com/security/cve/CVE-2010-0926 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=562568 x_refsource_CONFIRMIssue Tracking
- https://bugzilla.samba.org/show_bug.cgi?id=7104 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2010-0926
- https://www.cve.org/CVERecord?id=CVE-2010-0926
Change history (0)
No recorded changes yet.