CVE-2024-23527: An out-of-bounds read vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3, in certain conditions can allow an…
Noroxi assessment
Priority: Monitor (action score 31/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.9% (FIRST EPSS); higher than 80.8% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: Ivanti Avalanche 6.4.3.
- Severity is disputed: the assigning authority (CNA) scores it 5.3, NVD 7.5.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Ivanti Avalanche 6.4.3 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
An out-of-bounds read vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3, in certain conditions can allow an unauthenticated remote attacker to read sensitive information in memory.
- Published
- Apr 25, 2024
- Updated
- Jun 17, 2026
- EPSS
- 1.9% · 80th percentile
- CWE
- CWE-125
Report tools
Action score
31
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 1.9%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.5
- CNA · hackerone
- 5.3
- 2.2 point gap
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| ivanti | avalanche | cpe:2.3:a:ivanti:avalanche |
Versions reported by the vendor
Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.
Ivanti Avalanche
- 6.4.3 and later · before 6.4.3affected · semver
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- ivanti avalanchebefore 6.4.3.528
Same product
ivanti: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-32560An attacker can send a specially crafted message to the Wavelink Avalanche Manager, which could result in service disruption or arbitrary…69This week
- CVE-2023-46264An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.4.1 and below that could allow an attacker…66This week
- CVE-2023-32563An unauthenticated attacker could achieve the code execution through a RemoteControl server.66This week
Published before and after this one in the same product
- ← EarlierCVE-2024-27984Apr 18, 2024 · A Path Traversal vulnerability in web component of Ivanti Avalanche before 6.4.3 allows a remote authenticated attacker to delete specific…29Monitor
- ← EarlierCVE-2024-29204Apr 18, 2024 · A Heap Overflow vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3 allows a remote unauthenticated attacker to…40Plan
- Later →CVE-2024-29848May 31, 2024 · An unrestricted file upload vulnerability in web component of Ivanti Avalanche before 6.4.x allows an authenticated, privileged user to…47Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Ivanti Avalanche | 6.4.3 | Vendor (CNA) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2024-235267 days apartAn out-of-bounds read vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3, in certain conditions can allow an…31Monitor
- CVE-2024-235287 days apartAn out-of-bounds read vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3, in certain conditions can allow an…31Monitor
- CVE-2024-235297 days apartAn out-of-bounds read vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3, in certain conditions can allow an…31Monitor
- CVE-2024-235307 days apartAn out-of-bounds read vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3, in certain conditions can allow an…31Monitor
- CVE-2024-235327 days apartAn out-of-bounds Read vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3 allows an authenticated remote…31Monitor
- CVE-2024-50331201 days apartAn out-of-bounds read vulnerability in Ivanti Avalanche before 6.4.6 allows a remote unauthenticated attacker to leak sensitive information…30Monitor
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-24-0348 · Apr 25, 2024(İvanti Güvenlik Bildirimi)
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-125 · Out-of-bounds ReadCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
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Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.