rpm package
almalinux/unbound
pkg:rpm/almalinux/unbound
Vulnerabilities (19)
| CVE | Sev | CVSS | KEV | Affected versions | Fixed in | Published | Description |
|---|---|---|---|---|---|---|---|
| CVE-2026-55973 | Hig | 7.5 | < 1.24.2-3.el9_8.4 | 1.24.2-3.el9_8.4 | Jul 22, 2026 | In NLnet Labs Unbound 1.23.0 up to and including 1.25.1, when 'dns-error-reporting: yes' is set, the EDNS Report-Channel option (code 18) from the last upstream response is read and uses the option's length as the length of the agent domain. When a domain name check is performed | |
| CVE-2026-44690 | Hig | 7.5 | < 1.16.2-5.14.el8_10 | 1.16.2-5.14.el8_10 | Jul 22, 2026 | In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, insufficient validation of the RRSIG.Labels field combined with premature cache writes during RFC 8198 aggressive NSEC processing leads to cache poisoning that permits a malicious actor controlling a single delegated zone to | |
| CVE-2026-44390 | Med | 5.3 | < 1.24.2-7.el10_2.2 | 1.24.2-7.el10_2.2 | May 20, 2026 | NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability when handling replies with very large RRsets that Unbound needs to perform name compression for. Malicious upstream responses with very large RRsets with records that don't share a suffix above the root can | |
| CVE-2026-42959 | Hig | 7.5 | < 1.24.2-7.el10_2.1 | 1.24.2-7.el10_2.1 | May 20, 2026 | NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upstream replies. When Unbound constructs chase-reply messages for validation, the code uses the wrong counter to calculate | |
| CVE-2026-42944 | Hig | 7.5 | < 1.24.2-7.el10_2.1 | 1.24.2-7.el10_2.1 | May 20, 2026 | NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when encoding multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options in the reply packet. The relevant options ('nsid', 'answer-cookie', 'pad-responses' (defau | |
| CVE-2026-42534 | Med | 5.3 | < 1.24.2-7.el10_2.2 | 1.24.2-7.el10_2.2 | May 20, 2026 | NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the jostle logic that could defeat its purpose and degrade resolution performance. Retransmits of the same query could renew the age of slow running queries and not allow the jostle logic to see them as | |
| CVE-2026-41292 | Hig | 7.5 | < 1.24.2-7.el10_2.2 | 1.24.2-7.el10_2.2 | May 20, 2026 | NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creat | |
| CVE-2026-40622 | Hig | 7.5 | < 1.24.2-7.el10_2.2 | 1.24.2-7.el10_2.2 | May 20, 2026 | NLnet Labs Unbound 1.16.2 up to and including version 1.25.0 has a vulnerability of the 'ghost domain names' family of attacks that could extend the ghost domain window by up to one cached TTL configured value. Similar to other 'ghost domain names' attacks, an adversary needs to | |
| CVE-2026-33278 | Cri | 9.8 | < 1.24.2-7.el10_2.1 | 1.24.2-7.el10_2.1 | May 20, 2026 | NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote code execution as a result of deep copying a data structure and erroneously overwriting a destination pointer. An adversary | |
| CVE-2025-11411 | Med | — | < 1.24.2-7.el10 | 1.24.2-7.el10 | Oct 22, 2025 | NLnet Labs Unbound up to and including version 1.24.1 is vulnerable to possible domain hijack attacks. Promiscuous NS RRSets that complement positive DNS replies in the authority section can be used to trick resolvers to update their delegation information for the zone. Usually t | |
| CVE-2025-5994 | Hig | — | < 1.16.2-19.el9_6.1 | 1.16.2-19.el9_6.1 | Jul 16, 2025 | A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along | |
| CVE-2024-8508 | Med | 5.3 | < 1.16.2-8.el9_5.1 | 1.16.2-8.el9_5.1 | Oct 3, 2024 | NLnet Labs Unbound up to and including version 1.21.0 contains a vulnerability when handling replies with very large RRsets that it needs to perform name compression for. Malicious upstreams responses with very large RRsets can cause Unbound to spend a considerable time applying | |
| CVE-2024-33655 | Hig | 7.5 | < 1.24.2-7.el10 | 1.24.2-7.el10 | Jun 6, 2024 | The DNS protocol in RFC 1035 and updates allows remote attackers to cause a denial of service (resource consumption) by arranging for DNS queries to be accumulated for seconds, such that responses are later sent in a pulsing burst (which can be considered traffic amplification in | |
| CVE-2024-1488 | Hig | 8.0 | < 1.16.2-3.el9_3.5 | 1.16.2-3.el9_3.5 | Feb 15, 2024 | A vulnerability was found in Unbound due to incorrect default permissions, allowing any process outside the unbound group to modify the unbound runtime configuration. If a process can connect over localhost to port 8953, it can alter the configuration of unbound.service. This fla | |
| CVE-2023-50868 | Hig | 7.5 | < 1.16.2-5.el8_9.2 | 1.16.2-5.el8_9.2 | Feb 14, 2024 | The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 51 | |
| CVE-2023-50387 | Hig | 7.5 | < 1.16.2-5.el8_9.2 | 1.16.2-5.el8_9.2 | Feb 14, 2024 | Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with man | |
| CVE-2022-3204 | Hig | 7.5 | < 1.16.2-3.el9 | 1.16.2-3.el9 | Sep 26, 2022 | A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a considerable number of non responsive nameservers. The attack starts by quer | |
| CVE-2022-30699 | Med | 6.5 | < 1.16.2-2.el8 | 1.16.2-2.el8 | Aug 1, 2022 | NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire | |
| CVE-2022-30698 | Med | 6.5 | < 1.16.2-2.el8 | 1.16.2-2.el8 | Aug 1, 2022 | NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation in |
- affected < 1.24.2-3.el9_8.4fixed 1.24.2-3.el9_8.4
In NLnet Labs Unbound 1.23.0 up to and including 1.25.1, when 'dns-error-reporting: yes' is set, the EDNS Report-Channel option (code 18) from the last upstream response is read and uses the option's length as the length of the agent domain. When a domain name check is performed
- affected < 1.16.2-5.14.el8_10fixed 1.16.2-5.14.el8_10
In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, insufficient validation of the RRSIG.Labels field combined with premature cache writes during RFC 8198 aggressive NSEC processing leads to cache poisoning that permits a malicious actor controlling a single delegated zone to
- affected < 1.24.2-7.el10_2.2fixed 1.24.2-7.el10_2.2
NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability when handling replies with very large RRsets that Unbound needs to perform name compression for. Malicious upstream responses with very large RRsets with records that don't share a suffix above the root can
- affected < 1.24.2-7.el10_2.1fixed 1.24.2-7.el10_2.1
NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead to a crash given malicious upstream replies. When Unbound constructs chase-reply messages for validation, the code uses the wrong counter to calculate
- affected < 1.24.2-7.el10_2.1fixed 1.24.2-7.el10_2.1
NLnet Labs Unbound 1.14.0 up to and including version 1.25.0 has a vulnerability that results in heap overflow when encoding multiple NSID and/or DNS Cookie EDNS and/or EDNS Padding options in the reply packet. The relevant options ('nsid', 'answer-cookie', 'pad-responses' (defau
- affected < 1.24.2-7.el10_2.2fixed 1.24.2-7.el10_2.2
NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the jostle logic that could defeat its purpose and degrade resolution performance. Retransmits of the same query could renew the age of slow running queries and not allow the jostle logic to see them as
- affected < 1.24.2-7.el10_2.2fixed 1.24.2-7.el10_2.2
NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creat
- affected < 1.24.2-7.el10_2.2fixed 1.24.2-7.el10_2.2
NLnet Labs Unbound 1.16.2 up to and including version 1.25.0 has a vulnerability of the 'ghost domain names' family of attacks that could extend the ghost domain window by up to one cached TTL configured value. Similar to other 'ghost domain names' attacks, an adversary needs to
- affected < 1.24.2-7.el10_2.1fixed 1.24.2-7.el10_2.1
NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote code execution as a result of deep copying a data structure and erroneously overwriting a destination pointer. An adversary
- affected < 1.24.2-7.el10fixed 1.24.2-7.el10
NLnet Labs Unbound up to and including version 1.24.1 is vulnerable to possible domain hijack attacks. Promiscuous NS RRSets that complement positive DNS replies in the authority section can be used to trick resolvers to update their delegation information for the zone. Usually t
- affected < 1.16.2-19.el9_6.1fixed 1.16.2-19.el9_6.1
A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along
- affected < 1.16.2-8.el9_5.1fixed 1.16.2-8.el9_5.1
NLnet Labs Unbound up to and including version 1.21.0 contains a vulnerability when handling replies with very large RRsets that it needs to perform name compression for. Malicious upstreams responses with very large RRsets can cause Unbound to spend a considerable time applying
- affected < 1.24.2-7.el10fixed 1.24.2-7.el10
The DNS protocol in RFC 1035 and updates allows remote attackers to cause a denial of service (resource consumption) by arranging for DNS queries to be accumulated for seconds, such that responses are later sent in a pulsing burst (which can be considered traffic amplification in
- affected < 1.16.2-3.el9_3.5fixed 1.16.2-3.el9_3.5
A vulnerability was found in Unbound due to incorrect default permissions, allowing any process outside the unbound group to modify the unbound runtime configuration. If a process can connect over localhost to port 8953, it can alter the configuration of unbound.service. This fla
- affected < 1.16.2-5.el8_9.2fixed 1.16.2-5.el8_9.2
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 51
- affected < 1.16.2-5.el8_9.2fixed 1.16.2-5.el8_9.2
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with man
- affected < 1.16.2-3.el9fixed 1.16.2-3.el9
A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a considerable number of non responsive nameservers. The attack starts by quer
- affected < 1.16.2-2.el8fixed 1.16.2-2.el8
NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire
- affected < 1.16.2-2.el8fixed 1.16.2-2.el8
NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation in