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    CVE-2007-0493

    Use-after-free vulnerability in ISC BIND 9.3.0 up to 9.3.3, 9.4.0a1 up to 9.4.0a6, 9.4.0b1 up to 9.4.0b4, 9.4.0rc1, and 9.5.0a1 (Bind Forum only) allows remote attackers to cause a denial of service (named daemon crash) via unspecified vectors that cause named to "dereference a freed fetch context."

    Published:Jan 25, 2007
    Last Modified:Apr 23, 2026
    EPS:Jan 25, 2007
    EPSS Score:0.13838
    CVSS Score:7.8

    Affected Products

    Vendor
    Isc
    Product
    Bind
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-12617 (CVSS 7.5) — The issue is unexpected program termination based on ordering and/or specific content in responses to queries …
    CVE-2026-11605 (CVSS 7.5) — The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND always validates all …
    CVE-2026-10723 (CVSS 6.8) — BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authentica…
    CVE-2026-10822 (CVSS 6.5) — If BIND encounters a particular invalid data structure in a DNS record, it will accept the invalid data, and m…
    CVE-2026-13204 (CVSS 7.5) — If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RR…
    CVE-2026-11331 (CVSS 7.5) — An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names…
    CVE-2026-11622 (CVSS 7.5) — A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer f…
    CVE-2026-11721 (CVSS 7.5) — It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels …
    CVE-2026-13321 (CVSS 8.6) — The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the si…
    CVE-2026-5950 (CVSS 5.3) — An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling,…

    References

    http://docs.info.apple.com/article.html?artnum=305530
    http://fedoranews.org/cms/node/2507
    http://fedoranews.org/cms/node/2537
    http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2007-003.txt.asc
    http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01070495
    http://lists.apple.com/archives/security-announce/2007/May/msg00004.html
    http://lists.grok.org.uk/pipermail/full-disclosure/2007-January/052018.html
    http://lists.suse.com/archive/suse-security-announce/2007-Jan/0016.html
    http://marc.info/?l=bind-announce&m=116968519321296&w=2
    http://secunia.com/advisories/23904
    http://secunia.com/advisories/23924
    http://secunia.com/advisories/23943
    http://secunia.com/advisories/23972
    http://secunia.com/advisories/23974
    http://secunia.com/advisories/23977
    http://secunia.com/advisories/24014
    http://secunia.com/advisories/24048
    http://secunia.com/advisories/24054
    http://secunia.com/advisories/24129
    http://secunia.com/advisories/24203
    http://secunia.com/advisories/24930
    http://secunia.com/advisories/24950
    http://secunia.com/advisories/25402
    http://secunia.com/advisories/25649
    http://security.freebsd.org/advisories/FreeBSD-SA-07:02.bind.asc
    http://security.gentoo.org/glsa/glsa-200702-06.xml
    http://securitytracker.com/id?1017561
    http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.494157
    http://www.isc.org/index.pl?/sw/bind/bind-security.php
    http://www.isc.org/index.pl?/sw/bind/view/?release=9.2.8
    http://www.isc.org/index.pl?/sw/bind/view/?release=9.3.4
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:030
    http://www.openpkg.com/security/advisories/OpenPKG-SA-2007.007.html
    http://www.redhat.com/support/errata/RHSA-2007-0057.html
    http://www.securityfocus.com/archive/1/458066/100/0/threaded
    http://www.securityfocus.com/bid/22229
    http://www.trustix.org/errata/2007/0005
    http://www.ubuntu.com/usn/usn-418-1
    http://www.vupen.com/english/advisories/2007/0349
    http://www.vupen.com/english/advisories/2007/1401
    http://www.vupen.com/english/advisories/2007/1939
    http://www.vupen.com/english/advisories/2007/2163
    http://www.vupen.com/english/advisories/2007/2315
    https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952488
    https://issues.rpath.com/browse/RPL-989
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9614
    https://www2.itrc.hp.com/service/cki/docDisplay.do?docId=c00967144
    http://docs.info.apple.com/article.html?artnum=305530
    http://fedoranews.org/cms/node/2507
    http://fedoranews.org/cms/node/2537
    http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2007-003.txt.asc
    http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01070495
    http://lists.apple.com/archives/security-announce/2007/May/msg00004.html
    http://lists.grok.org.uk/pipermail/full-disclosure/2007-January/052018.html
    http://lists.suse.com/archive/suse-security-announce/2007-Jan/0016.html
    http://marc.info/?l=bind-announce&m=116968519321296&w=2
    http://secunia.com/advisories/23904
    http://secunia.com/advisories/23924
    http://secunia.com/advisories/23943
    http://secunia.com/advisories/23972
    http://secunia.com/advisories/23974
    http://secunia.com/advisories/23977
    http://secunia.com/advisories/24014
    http://secunia.com/advisories/24048
    http://secunia.com/advisories/24054
    http://secunia.com/advisories/24129
    http://secunia.com/advisories/24203
    http://secunia.com/advisories/24930
    http://secunia.com/advisories/24950
    http://secunia.com/advisories/25402
    http://secunia.com/advisories/25649
    http://security.freebsd.org/advisories/FreeBSD-SA-07:02.bind.asc
    http://security.gentoo.org/glsa/glsa-200702-06.xml
    http://securitytracker.com/id?1017561
    http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.494157
    http://www.isc.org/index.pl?/sw/bind/bind-security.php
    http://www.isc.org/index.pl?/sw/bind/view/?release=9.2.8
    http://www.isc.org/index.pl?/sw/bind/view/?release=9.3.4
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:030
    http://www.openpkg.com/security/advisories/OpenPKG-SA-2007.007.html
    http://www.redhat.com/support/errata/RHSA-2007-0057.html
    http://www.securityfocus.com/archive/1/458066/100/0/threaded
    http://www.securityfocus.com/bid/22229
    http://www.trustix.org/errata/2007/0005
    http://www.ubuntu.com/usn/usn-418-1
    http://www.vupen.com/english/advisories/2007/0349
    http://www.vupen.com/english/advisories/2007/1401
    http://www.vupen.com/english/advisories/2007/1939
    http://www.vupen.com/english/advisories/2007/2163
    http://www.vupen.com/english/advisories/2007/2315
    https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952488
    https://issues.rpath.com/browse/RPL-989
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9614
    https://www2.itrc.hp.com/service/cki/docDisplay.do?docId=c00967144

    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