CVE-2015-3223

CVE-2015-3223 is a medium-severity vulnerability in Samba with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

• Severity: Medium (CVSS 3.x base score 5.3)
• CVSS v2: 5.0
• EPSS exploit prediction: 7% (93rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-189
• Affected product: Samba
• Published: 2015-12-29
• Last modified: 2026-06-17

Description

The ldb_wildcard_compare function in ldb_match.c in ldb before 1.1.24, as used in the AD LDAP server in Samba 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3, mishandles certain zero values, which allows remote attackers to cause a denial of service (infinite loop) via crafted packets.

Frequently asked questions

What is CVE-2015-3223?

The ldb_wildcard_compare function in ldb_match.c in ldb before 1.1.24, as used in the AD LDAP server in Samba 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3, mishandles certain zero values, which allows remote attackers to cause a denial of service (infinite loop) via crafted packets.

How severe is CVE-2015-3223?

CVE-2015-3223 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2015-3223 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3223?

CVE-2015-3223 primarily affects Samba. In total, 57 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-3223?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-3223 published?

CVE-2015-3223 was published on 2015-12-29 and last updated on 2026-06-17.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html
• http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
• http://www.debian.org/security/2016/dsa-3433
• http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
• http://www.securityfocus.com/bid/79731
• http://www.securitytracker.com/id/1034493
• http://www.ubuntu.com/usn/USN-2855-1
• http://www.ubuntu.com/usn/USN-2855-2
• http://www.ubuntu.com/usn/USN-2856-1
• https://bugzilla.redhat.com/show_bug.cgi?id=1290287
• https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=aa6c27148b9d3f8c1e4fdd5dd46bfecbbd0ca465
• https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=ec504dbf69636a554add1f3d5703dd6c3ad450b8
• https://security.gentoo.org/glsa/201612-47
• https://www.samba.org/samba/security/CVE-2015-3223.html

Affected products (57)

• cpe:2.3:a:samba:samba:4.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.9:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.11:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.12:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.13:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.14:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.15:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.16:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.17:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.18:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.19:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.20:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.21:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.22:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.23:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.24:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.5:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.9:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.10:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.11:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.12:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.13:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.1.14:*:*:*:*:*:*:*

More vulnerabilities in Samba

• CVE-2015-0240 — Critical (CVSS 10.0): The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before…
• CVE-2012-1182 — Critical (CVSS 10.0): The RPC code generator in Samba 3.x before 3.4.16, 3.5.x before 3.5.14, and 3.6.x before 3.6.4 does not implement…
• CVE-2007-2446 — Critical (CVSS 10.0): Multiple heap-based buffer overflows in the NDR parsing in smbd in Samba 3.0.0 through 3.0.25rc3 allow remote attackers…
• CVE-2004-0882 — Critical (CVSS 10.0): Buffer overflow in the QFILEPATHINFO request handler in Samba 3.0.x through 3.0.7 may allow remote attackers to execute…
• CVE-2004-1154 — Critical (CVSS 10.0): Integer overflow in the Samba daemon (smbd) in Samba 2.x and 3.0.x through 3.0.9 allows remote authenticated users to…
• CVE-2004-0600 — Critical (CVSS 10.0): Buffer overflow in the Samba Web Administration Tool (SWAT) in Samba 3.0.2 to 3.0.4 allows remote attackers to execute…

All CVEs affecting Samba →

Other CWE-189 (Numeric Errors) vulnerabilities

• CVE-2015-8396 — Critical (CVSS 10.0): Integer overflow in the ImageRegionReader::ReadIntoBuffer function in…
• CVE-2015-7205 — Critical (CVSS 10.0): Integer underflow in the RTPReceiverVideo::ParseRtpPacket function in Mozilla Firefox before 43.0 and Firefox ESR 38.x…
• CVE-2015-6575 — Critical (CVSS 10.0): SampleTable.cpp in libstagefright in Android before 5.1.1 LMY48I does not properly consider integer promotion, which…
• CVE-2015-3864 — Critical (CVSS 10.0): Integer underflow in the MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in mediaserver in…
• CVE-2015-3836 — Critical (CVSS 10.0): The Parse_wave function in arm-wt-22k/lib_src/eas_mdls.c in the Sonivox DLS-to-EAS converter in Android before 5.1.1…
• CVE-2015-3834 — Critical (CVSS 10.0): Multiple integer overflows in the BnHDCP::onTransact function in media/libmedia/IHDCP.cpp in libstagefright in Android…

Browse all CWE-189 (Numeric Errors) vulnerabilities →