medium
6.8
CWE
119
Advisory Published
Updated

CVE-2011-3581: Buffer Overflow

First published: Fri Nov 04 2011(Updated: )

Heap-based buffer overflow in the ldns_rr_new_frm_str_internal function in ldns before 1.6.11 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a Resource Record (RR) with an unknown type containing input that is longer than a specified length.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
NLnet Labs LDNS=1.6.6
NLnet Labs LDNS=1.5.1
NLnet Labs LDNS=1.1.0
NLnet Labs LDNS=1.2.1
NLnet Labs LDNS=1.2.2
NLnet Labs LDNS=1.6.1
NLnet Labs LDNS=1.0.0
NLnet Labs LDNS=1.6.9
NLnet Labs LDNS=1.6.3
NLnet Labs LDNS=0.65
NLnet Labs LDNS=1.3
NLnet Labs LDNS=1.6.4
NLnet Labs LDNS<=1.6.10
NLnet Labs LDNS=1.6.7
NLnet Labs LDNS=1.5.0
NLnet Labs LDNS=1.6.0
NLnet Labs LDNS=0.66
NLnet Labs LDNS=1.4.0
NLnet Labs LDNS=1.4.1
NLnet Labs LDNS=0.50
NLnet Labs LDNS=0.60
NLnet Labs LDNS=0.70
NLnet Labs LDNS=1.2.0
NLnet Labs LDNS=1.6.8
NLnet Labs LDNS=1.6.5
NLnet Labs LDNS=1.6.2

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-3581?

    CVE-2011-3581 is considered to have a high severity due to its potential for remote denial of service and arbitrary code execution.

  • How do I fix CVE-2011-3581?

    To fix CVE-2011-3581, upgrade ldns to version 1.6.11 or later, which contains the necessary patches.

  • What causes the vulnerability described in CVE-2011-3581?

    CVE-2011-3581 is caused by a heap-based buffer overflow in the ldns_rr_new_frm_str_internal function.

  • What versions of ldns are affected by CVE-2011-3581?

    CVE-2011-3581 affects multiple versions of ldns, specifically all versions up to and including 1.6.10.

  • Can CVE-2011-3581 be exploited by an attacker remotely?

    Yes, CVE-2011-3581 can be exploited by remote attackers sending crafted Resource Records with excessive input.

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