CVE-2009-0025

CVE-2009-0025 is a medium-severity vulnerability in Isc Bind with a CVSS 2.0 base score of 6.8. 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-287.

Key facts

• Severity: Medium (CVSS 2.0 base score 6.8)
• EPSS exploit prediction: 7% (93rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-287
• Affected product: Isc Bind
• Published: 2009-01-07
• Last modified: 2026-06-16

Description

BIND 9.6.0, 9.5.1, 9.5.0, 9.4.3, and earlier does not properly check the return value from the OpenSSL DSA_verify function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077.

Frequently asked questions

What is CVE-2009-0025?

BIND 9.6.0, 9.5.1, 9.5.0, 9.4.3, and earlier does not properly check the return value from the OpenSSL DSA_verify function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077.

How severe is CVE-2009-0025?

CVE-2009-0025 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-0025 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-2009-0025?

CVE-2009-0025 primarily affects Isc Bind. In total, 97 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0025?

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

When was CVE-2009-0025 published?

CVE-2009-0025 was published on 2009-01-07 and last updated on 2026-06-16.

References

• http://groups.google.com/group/comp.protocols.dns.bind/browse_thread/thread/49ef622c8329fd33
• http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
• http://marc.info/?l=bugtraq&m=141879471518471&w=2
• http://secunia.com/advisories/33494
• http://secunia.com/advisories/33546
• http://secunia.com/advisories/33551
• http://secunia.com/advisories/33559
• http://secunia.com/advisories/33683
• http://secunia.com/advisories/33882
• http://secunia.com/advisories/35074
• http://security.freebsd.org/advisories/FreeBSD-SA-09:04.bind.asc
• http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.540362
• http://sunsolve.sun.com/search/document.do?assetkey=1-26-250846-1
• http://support.apple.com/kb/HT3549
• http://support.avaya.com/elmodocs2/security/ASA-2009-045.htm
• http://wiki.rpath.com/Advisories:rPSA-2009-0009
• http://www.ocert.org/advisories/ocert-2008-016.html
• http://www.openbsd.org/errata44.html#008_bind
• http://www.securityfocus.com/archive/1/499827/100/0/threaded
• http://www.securityfocus.com/archive/1/500207/100/0/threaded
• http://www.securityfocus.com/archive/1/502322/100/0/threaded
• http://www.securityfocus.com/bid/33151
• http://www.us-cert.gov/cas/techalerts/TA09-133A.html
• http://www.vmware.com/security/advisories/VMSA-2009-0004.html
• http://www.vupen.com/english/advisories/2009/0043
• http://www.vupen.com/english/advisories/2009/0366
• http://www.vupen.com/english/advisories/2009/0904
• http://www.vupen.com/english/advisories/2009/1297
• https://issues.rpath.com/browse/RPL-2938
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10879

Affected products (97)

• cpe:2.3:a:isc:bind:9.0:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc4:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc5:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.0:rc6:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.1:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.0.1:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc4:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc5:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc6:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.1:rc7:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.2:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.3:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.3:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.1.3:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:a1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:a2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:a3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:b1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:b2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc10:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc2:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc3:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc4:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc5:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc6:*:*:*:*:*:*
• cpe:2.3:a:isc:bind:9.2.0:rc7:*:*:*:*:*:*

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 →

Other CWE-287 (Improper Authentication) vulnerabilities

• CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
• CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
• CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
• CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
• CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
• CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →