SUSE: 2024:2636-1 important: bind Security Advisory Updates
Summary
## This update for bind fixes the following issues: Update to release 9.18.28 Security fixes: * CVE-2024-0760: Fixed a flood of DNS messages over TCP may make the server unstable (bsc#1228255) * CVE-2024-1737: Fixed BIND's database will be slow if a very large number of RRs exist at the same name (bsc#1228256) * CVE-2024-1975: Fixed SIG(0) can be used to exhaust CPU resources (bsc#1228257) * CVE-2024-4076: Fixed assertion failure when serving both stale cache data and authoritative zone content (bsc#1228258) Changelog: * Command-line options for IPv4-only (named -4) and IPv6-only (named -6) modes are now respected for zone primaries, also-notify, and parental-agents. * An RPZ responseâs SOA record TTL was set to 1 instead of the SOA TTL, if add-soa was used. This has been fixed. * When a query related to zone maintenance (NOTIFY, SOA) timed out close to a view shutdown (triggered e.g. by rndc reload), named could crash with an assertion failure. This has been fixed. * The statistics channel counters that indicated the number of currently connected TCP IPv4/IPv6 clients were not properly adjusted in certain failure scenarios. This has been fixed. * Some servers that could not be reached due to EHOSTDOWN or ENETDOWN conditions were incorrectly prioritized during server selection. These are now properly handled as unreachable. * On some systems the libuv call may return an error code when sending a TCP reset for a connection, which triggers an assertion failure in named. This error condition is now dealt with in a more graceful manner, by logging the incident and shutting down the connection. * Changes to listen-on statements were ignored on reconfiguration unless the port or interface address was changed, making it impossible to change a related listener transport type. That issue has been fixed. * A bug in the keymgr code unintentionally slowed down some DNSSEC key rollovers. This has been fixed. * Some ISO 8601 durations were accepted erroneously, leading to shorter durations than expected. This has been fixed * A regression in cache-cleaning code enabled memory use to grow significantly more quickly than before, until the configured max-cache-size limit was reached. This has been fixed. * Using rndc flush inadvertently caused cache cleaning to become less effective. This could ultimately lead to the configured max-cache-size limit being exceeded and has now been fixed. * The logic for cleaning up expired cached DNS records was tweaked to be more aggressive. This change helps with enforcing max-cache-ttl and max-ncache- ttl in a timely manner. * It was possible to trigger a use-after-free assertion when the overmem cache cleaning was initiated. This has been fixed. New Features: * A new option signatures-jitter has been added to dnssec-policy to allow signature expirations to be spread out over a period of time. * The statistics channel now includes counters that indicate the number of currently connected TCP IPv4/IPv6 clients. * Added RESOLVER.ARPA to the built in empty zones. Feature Changes: * DNSSEC signatures that are not valid because the current time falls outside the signature inception and expiration dates are skipped instead of causing an immediate validation failure. Security Fixes: * A malicious DNS client that sent many queries over TCP but never read the responses could cause a server to respond slowly or not at all for other clients. This has been fixed. (CVE-2024-0760) * It is possible to craft excessively large resource records sets, which have the effect of slowing down database processing. This has been addressed by adding a configurable limit to the number of records that can be stored per name and type in a cache or zone database. The default is 100, which can be tuned with the new max-records-per-type option. * It is possible to craft excessively large numbers of resource record types for a given owner name, which has the effect of slowing down database processing. This has been addressed by adding a configurable limit to the number of records that can be stored per name and type in a cache or zone database. The default is 100, which can be tuned with the new max-types-per- name option. (CVE-2024-1737) * Validating DNS messages signed using the SIG(0) protocol (RFC 2931) could cause excessive CPU load, leading to a denial-of-service condition. Support for SIG(0) message validation was removed from this version of named. (CVE-2024-1975) * Due to a logic error, lookups that triggered serving stale data and required lookups in local authoritative zone data could have resulted in an assertion failure. This has been fixed. * Potential data races were found in our DoH implementation, related to HTTP/2 session object management and endpoints set object management after reconfiguration. These issues have been fixed. * When looking up the NS records of parent zones as part of looking up DS records, it was possible for named to trigger an assertion failure if serve- stale was enabled. This has been fixed. (CVE-2024-4076) ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * Server Applications Module 15-SP6 zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP6-2024-2636=1 * openSUSE Leap 15.6 zypper in -t patch SUSE-2024-2636=1 openSUSE-SLE-15.6-2024-2636=1 * Basesystem Module 15-SP6 zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP6-2024-2636=1 ## Package List: * Server Applications Module 15-SP6 (aarch64 ppc64le s390x x86_64) * bind-debugsource-9.18.28-150600.3.3.1 * bind-debuginfo-9.18.28-150600.3.3.1 * bind-9.18.28-150600.3.3.1 * Server Applications Module 15-SP6 (noarch) * bind-doc-9.18.28-150600.3.3.1 * openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64 i586) * bind-utils-debuginfo-9.18.28-150600.3.3.1 * bind-debuginfo-9.18.28-150600.3.3.1 * bind-utils-9.18.28-150600.3.3.1 * bind-9.18.28-150600.3.3.1 * bind-debugsource-9.18.28-150600.3.3.1 * openSUSE Leap 15.6 (noarch) * bind-doc-9.18.28-150600.3.3.1 * Basesystem Module 15-SP6 (aarch64 ppc64le s390x x86_64) * bind-utils-debuginfo-9.18.28-150600.3.3.1 * bind-debugsource-9.18.28-150600.3.3.1 * bind-debuginfo-9.18.28-150600.3.3.1 * bind-utils-9.18.28-150600.3.3.1
References
* bsc#1228255
* bsc#1228256
* bsc#1228257
* bsc#1228258
Cross-
* CVE-2024-0760
* CVE-2024-1737
* CVE-2024-1975
* CVE-2024-4076
CVSS scores:
* CVE-2024-0760 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2024-1737 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2024-1975 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2024-4076 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:
* Basesystem Module 15-SP6
* openSUSE Leap 15.6
* Server Applications Module 15-SP6
* SUSE Linux Enterprise Desktop 15 SP6
* SUSE Linux Enterprise Real Time 15 SP6
* SUSE Linux Enterprise Server 15 SP6
* SUSE Linux Enterprise Server for SAP Applications 15 SP6
An update that solves four vulnerabilities can now be installed.
##
* https://www.suse.com/security/cve/CVE-2024-0760.html
* https://www.suse.com/security/cve/CVE-2024-1737.html
* https://www.suse.com/security/cve/CVE-2024-1975.html
* https://www.suse.com/security/cve/CVE-2024-4076.html
* https://bugzilla.suse.com/show_bug.cgi?id=1228255
* https://bugzilla.suse.com/show_bug.cgi?id=1228256
* https://bugzilla.suse.com/show_bug.cgi?id=1228257
* https://bugzilla.suse.com/show_bug.cgi?id=1228258