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alsa-2025:0837
Vulnerability from osv_almalinux
Published
2025-01-30 00:00
Modified
2025-01-31 11:22
Summary
Important: unbound security update
Details
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.
Security Fix(es):
- unbound: unrestricted reconfiguration enabled to anyone that may lead to local privilege escalation (CVE-2024-1488)
- unbound: Unbounded name compression could lead to Denial of Service (CVE-2024-8508)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
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CVE-2024-1488 (GCVE-0-2024-1488)
Vulnerability from cvelistv5 – Published: 2024-02-15 05:04 – Updated: 2025-11-11 15:29
VLAI?
EPSS
Title
Unbound: unrestricted reconfiguration enabled to anyone that may lead to local privilege escalation
Summary
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 flaw allows an unprivileged attacker to manipulate a running instance, potentially altering forwarders, allowing them to track all queries forwarded by the local resolver, and, in some cases, disrupting resolving altogether.
Severity ?
CWE
- CWE-276 - Incorrect Default Permissions
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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Impacted products
| Vendor | Product | Version | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Affected:
1.16.2
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
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Date Public ?
2024-02-13 00:00
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CVE-2024-8508 (GCVE-0-2024-8508)
Vulnerability from cvelistv5 – Published: 2024-10-03 16:27 – Updated: 2024-11-14 21:02
VLAI?
EPSS
Title
Unbounded name compression could lead to Denial of Service
Summary
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 name compression to downstream replies. This can lead to degraded performance and eventually denial of service in well orchestrated attacks. The vulnerability can be exploited by a malicious actor querying Unbound for the specially crafted contents of a malicious zone with very large RRsets. Before Unbound replies to the query it will try to apply name compression which was an unbounded operation that could lock the CPU until the whole packet was complete. Unbound version 1.21.1 introduces a hard limit on the number of name compression calculations it is willing to do per packet. Packets that need more compression will result in semi-compressed packets or truncated packets, even on TCP for huge messages, to avoid locking the CPU for long. This change should not affect normal DNS traffic.
Severity ?
5.3 (Medium)
CWE
- CWE-606 - Unchecked Input for Loop Condition
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| NLnet Labs | Unbound |
Affected:
0 , ≤ 1.21.0
(semver)
|
Date Public ?
2024-10-03 00:00
Credits
Toshifumi Sakaguchi
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"containers": {
"adp": [
{
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"cpes": [
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"other": {
"content": {
"id": "CVE-2024-8508",
"options": [
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"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-03T17:11:45.971377Z",
"version": "2.0.3"
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"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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{
"providerMetadata": {
"dateUpdated": "2024-11-14T21:02:40.473Z",
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"url": "http://www.openwall.com/lists/oss-security/2024/10/04/5"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00009.html"
}
],
"title": "CVE Program Container"
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"affected": [
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"vendor": "NLnet Labs",
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"datePublic": "2024-10-03T00:00:00.000Z",
"descriptions": [
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"lang": "en",
"value": "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 name compression to downstream replies. This can lead to degraded performance and eventually denial of service in well orchestrated attacks. The vulnerability can be exploited by a malicious actor querying Unbound for the specially crafted contents of a malicious zone with very large RRsets. Before Unbound replies to the query it will try to apply name compression which was an unbounded operation that could lock the CPU until the whole packet was complete. Unbound version 1.21.1 introduces a hard limit on the number of name compression calculations it is willing to do per packet. Packets that need more compression will result in semi-compressed packets or truncated packets, even on TCP for huge messages, to avoid locking the CPU for long. This change should not affect normal DNS traffic."
}
],
"metrics": [
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"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
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"description": "CWE-606: Unchecked Input for Loop Condition",
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"providerMetadata": {
"dateUpdated": "2024-10-03T16:27:54.540Z",
"orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
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"time": "2024-07-25T00:00:00.000Z",
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"time": "2024-10-03T00:00:00.000Z",
"value": "Fixes released with Unbound 1.21.1"
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"title": "Unbounded name compression could lead to Denial of Service"
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"dateUpdated": "2024-11-14T21:02:40.473Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- 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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