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CVE-2013-4496

20
FAUCET Score

CVE-2013-4496 describes a password-guessing vulnerability in Samba versions 3.x before 3.6.23, 4.0.x before 4.0.16, and 4.1.x before 4.1.6, affecting various Linux distributions including Canonical Ubuntu. The flaw allows remote attackers to bypass password-guessing protection mechanisms via brute-force SAMR or RAP attempts. With a CVSS score of 5.0 (medium), this vulnerability has a low attack complexity and could lead to unauthorized access (C:P), but does not impact integrity or availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.4.0, < 3.6.23CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.16CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 4.1.0, < 4.1.6CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
10.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
10.64%
Probability of exploitation in next 30 days
EPSS Percentile
95.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1064 is in the 94th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: samba3x-0:3.6.6-0.139.el5_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: samba-0:3.6.9-168.el6_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: samba4-0:4.0.0-61.el6_5.rc4
View patch
redhatno patchvia redhat_api
Product: Red Hat Storage 2.1Fixed in: samba

Vendor Advisories (1)

redhatCVE-2013-4496Moderate

samba: Password lockout not enforced for SAMR password changes

Mar 12, 2014

References

advisories.mageia.org / MGASA-2014-0138.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2014-August/136864.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2014-June/134717.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-04/msg00047.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-04/msg00048.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2014-03/msg00062.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2014-03/msg00063.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2014-0330.html
Third Party Advisory
bugzilla.samba.org / show_bug.cgi
Issue TrackingVendor Advisory
security.gentoo.org / glsa/glsa-201502-15.xml
Third Party Advisory
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
Third Party Advisory
mandriva.com / security/advisories
Third Party Advisory
samba.org / samba/history/samba-3.6.23.html
Vendor Advisory
samba.org / samba/history/samba-4.0.16.html
Vendor Advisory
samba.org / samba/history/samba-4.1.6.html
Vendor Advisory
samba.org / samba/security/CVE-2013-4496
Vendor Advisory
securityfocus.com / bid/66336
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2156-1
Third Party Advisory