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    CVE-2011-4079

    Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.

    Published:Oct 6, 2011
    Last Modified:Apr 11, 2025
    EPS:Oct 27, 2011
    EPSS Score:0.06754
    CVSS Score:4

    Affected Products

    Vendor
    Openldap
    Product
    Openldap

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-22185 (CVSS 4.6) — OpenLDAP Lightning Memory-Mapped Database (LMDB) versions up to and including 0.9.14, prior to commit 8e1fda8,…
    CVE-2023-2953 (CVSS 7.5) — A vulnerability was found in openldap. This security flaw causes a null pointer dereference in ber_memalloc_x(…
    CVE-2022-29155 (CVSS 9.8) — In OpenLDAP 2.x before 2.5.12 and 2.6.x before 2.6.2, a SQL injection vulnerability exists in the experimental…
    CVE-2021-27212 (CVSS 7.5) — In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion failure in slapd can occur in the issuer…
    CVE-2020-36221 (CVSS 7.5) — An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exac…
    CVE-2020-36222 (CVSS 7.5) — A flaw was discovered in OpenLDAP before 2.4.57 leading to an assertion failure in slapd in the saslAuthzTo va…
    CVE-2020-36224 (CVSS 7.5) — A flaw was discovered in OpenLDAP before 2.4.57 leading to an invalid pointer free and slapd crash in the sasl…
    CVE-2020-36225 (CVSS 7.5) — A flaw was discovered in OpenLDAP before 2.4.57 leading to a double free and slapd crash in the saslAuthzTo pr…
    CVE-2020-36226 (CVSS 7.5) — A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in t…
    CVE-2020-36228 (CVSS 7.5) — An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List…

    References

    http://secunia.com/advisories/46599
    http://security.gentoo.org/glsa/glsa-201406-36.xml
    http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9
    http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059
    http://www.openwall.com/lists/oss-security/2011/10/26/5
    http://www.openwall.com/lists/oss-security/2011/10/26/9
    http://www.securityfocus.com/bid/50384
    http://www.ubuntu.com/usn/USN-1266-1
    https://bugzilla.redhat.com/show_bug.cgi?id=749324
    https://exchange.xforce.ibmcloud.com/vulnerabilities/70991
    http://secunia.com/advisories/46599
    http://security.gentoo.org/glsa/glsa-201406-36.xml
    http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9
    http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059
    http://www.openwall.com/lists/oss-security/2011/10/26/5
    http://www.openwall.com/lists/oss-security/2011/10/26/9
    http://www.securityfocus.com/bid/50384
    http://www.ubuntu.com/usn/USN-1266-1
    https://bugzilla.redhat.com/show_bug.cgi?id=749324
    https://exchange.xforce.ibmcloud.com/vulnerabilities/70991

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High