CVE-2002-1221

CVE-2002-1221 is a medium-severity vulnerability in Isc Bind with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 8% (94th percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Isc Bind
• Published: 2002-11-29
• Last modified: 2026-06-16

Description

BIND 8.x through 8.3.3 allows remote attackers to cause a denial of service (crash) via SIG RR elements with invalid expiry times, which are removed from the internal BIND database and later cause a null dereference.

Frequently asked questions

What is CVE-2002-1221?

BIND 8.x through 8.3.3 allows remote attackers to cause a denial of service (crash) via SIG RR elements with invalid expiry times, which are removed from the internal BIND database and later cause a null dereference.

How severe is CVE-2002-1221?

CVE-2002-1221 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2002-1221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2002-1221?

CVE-2002-1221 primarily affects Isc Bind. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2002-1221?

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

When was CVE-2002-1221 published?

CVE-2002-1221 was published on 2002-11-29 and last updated on 2026-06-16.

References

• http://bvlive01.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21469
• http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000546
• http://lists.apple.com/archives/Security-announce/2002/Nov/msg00000.html
• http://marc.info/?l=bugtraq&m=103713117612842&w=2
• http://marc.info/?l=bugtraq&m=103763574715133&w=2
• http://online.securityfocus.com/advisories/4999
• http://online.securityfocus.com/archive/1/300019
• http://www.cert.org/advisories/CA-2002-31.html
• http://www.ciac.org/ciac/bulletins/n-013.shtml
• http://www.debian.org/security/2002/dsa-196
• http://www.isc.org/products/BIND/bind-security.html
• http://www.kb.cert.org/vuls/id/581682
• http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-077.php
• http://www.securityfocus.com/bid/6159
• https://exchange.xforce.ibmcloud.com/vulnerabilities/10333
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2094

Affected products (21)

• cpe:2.3:a:isc:bind:8.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.2:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.3.2:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:8.3.3:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd:freebsd:4.4:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd:freebsd:4.5:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd:freebsd:4.6:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd:freebsd:4.7:*:*:*:*:*:*:*
• cpe:2.3:o:openbsd:openbsd:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:openbsd:openbsd:3.1:*:*:*:*:*:*:*
• cpe:2.3:o:openbsd:openbsd:3.2:*:*:*:*:*:*:*

More vulnerabilities in Isc Bind

• CVE-2008-0122 — Critical (CVSS 10.0): Off-by-one error in the inet_network function in libbind in ISC BIND 9.4.2 and earlier, as used in libc in FreeBSD 6.2…
• CVE-2001-0011 — Critical (CVSS 10.0): Buffer overflow in nslookupComplain function in BIND 4 allows remote attackers to gain root privileges.
• CVE-2001-0013 — Critical (CVSS 10.0): Format string vulnerability in nslookupComplain function in BIND 4 allows remote attackers to gain root privileges.
• CVE-2001-0010 — Critical (CVSS 10.0): Buffer overflow in transaction signature (TSIG) handling code in BIND 8 allows remote attackers to gain root privileges.
• CVE-2000-1029 — Critical (CVSS 10.0): Buffer overflow in host command allows a remote attacker to execute arbitrary commands via a long response to an AXFR…
• CVE-1999-0837 — Critical (CVSS 10.0): Denial of service in BIND by improperly closing TCP sessions via so_linger.

All CVEs affecting Isc Bind →