RHSA-2002_119

Vulnerability from csaf_redhat - Published: 2002-07-30 08:07 - Updated: 2024-11-21 22:26
Summary
Red Hat Security Advisory: bind security update
Severity
Important
Notes
Topic: Version 9 of ISC BIND, prior to version 9.2.1, contained a denial of service (DoS) attack vulnerability. Various versions of the ISC BIND resolver libraries are vulnerable to a buffer overflow attack.
Details: ISC BIND (Berkeley Internet Name Domain) is an implementation of the DNS (Domain Name System) protocols. BIND includes a DNS server (named) -- which resolves hostnames to IP addresses, a resolver library (routines for applications to use when interfacing with DNS), and various tools. Versions of BIND 9 prior to 9.2.1 have a bug that causes certain requests to the BIND name server to fail an internal consistency check, causing the name server to stop responding to requests. This can be used by a remote attacker to cause a denial of service (DoS) attack against name servers. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2002-0400 to this issue. A buffer overflow vulnerability exists in multiple implementations of DNS resolver libraries. Applications that utilize vulnerable DNS resolver libraries may be affected. A remote attacker who is able to send malicious DNS responses could potentially exploit this vulnerability to execute arbitrary code or cause a denial of service (DoS) attack on a vulnerable system. Red Hat Linux does not ship with any applications or libraries that link against the BIND resolver libraries; however, third party code may be affected. (CAN-2002-0651) Red Hat Linux Advanced Server shipped with a version of ISC BIND vulnerable to both of these issues. All users of BIND are advised to upgrade to the errata packages containing BIND 9.2.1 which contains backported patches that correct these issues.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2002-0400

ISC BIND 9 before 9.2.1 allows remote attackers to cause a denial of service (shutdown) via a malformed DNS packet that triggers an error condition that is not properly handled when the rdataset parameter to the dns_message_findtype() function in message.c is not NULL, aka DoS_findtype.

Affected products
Product Identifier Version Remediation
Red Hat Enterprise Linux AS (Advanced Server) version 2.1
Red Hat / Red Hat Advanced Server
 cpe:/o:redhat:enterprise_linux:2.1::as —
Vendor Fix fix
Threats
Impact Important
CVE-2002-0651

Buffer overflow in the DNS resolver code used in libc, glibc, and libbind, as derived from ISC BIND, allows remote malicious DNS servers to cause a denial of service and possibly execute arbitrary code via the stub resolvers.

Affected products
Fixed 1 product, the same list as for CVE-2002-0400
Threats
Impact Important
References
To clipboard 

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        "text": "Version 9 of ISC BIND, prior to version 9.2.1, contained a denial of\nservice (DoS) attack vulnerability.  Various versions of the ISC BIND\nresolver libraries are vulnerable to a buffer overflow attack.",
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        "text": "ISC BIND (Berkeley Internet Name Domain) is an implementation of the DNS \n(Domain Name System) protocols.  BIND includes a DNS server (named) --\nwhich resolves hostnames to IP addresses, a resolver library\n(routines for applications to use when interfacing with DNS), and\nvarious tools.\n\nVersions of BIND 9 prior to 9.2.1 have a bug that causes certain requests\nto the BIND name server to fail an internal consistency check, causing the\nname server to stop responding to requests.  This can be used by a remote\nattacker to cause a denial of service (DoS) attack against name servers. \nThe Common Vulnerabilities and Exposures project (cve.mitre.org) has\nassigned the name CAN-2002-0400 to this issue.\n\nA buffer overflow vulnerability exists in multiple implementations of DNS\nresolver libraries. Applications that utilize vulnerable DNS resolver\nlibraries may be affected. A remote attacker who is able to send malicious\nDNS responses could potentially exploit this vulnerability to execute\narbitrary code or cause a denial of service (DoS) attack on a vulnerable\nsystem. Red Hat Linux does not ship with any applications or libraries that\nlink against the BIND resolver libraries; however, third party code may be\naffected. (CAN-2002-0651)\n\nRed Hat Linux Advanced Server shipped with a version of ISC BIND vulnerable\nto both of these issues.  All users of BIND are advised to upgrade to the\nerrata packages containing BIND 9.2.1 which contains backported patches\nthat correct these issues.",
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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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