Vulnerability

CVE-2019-17571

Critical· 9.8CVSS9.8EPSS28%

.rules3/5

Deserialization of Untrusted Data in Log4j

Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for log data. This affects Log4j versions 1.2 up to 1.2.17. Users are advised to migrate to `org.apache.logging.log4j:log4j-core`.

Threat signal

100/100

Severe

Severity

critical

CVSS

9.8

EPSS

28%

Active

CVSS

v3.1via NVDOpen in FIRST calculator →

9.8/ 10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredNoneUnauthenticated — no credentials needed.
User InteractionNoneFully automated — no victim action needed.
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

28.5%

probability of exploitation in next 30 days

p97

higher than 97% of all CVEs

3-day trend↑ 0pp

Above the FIRST 'patch on a priority schedule' threshold.

Vendor VEX

No VEX statements published for CVE-2019-17571. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCTrack

Total impact on non-trivial mission systems

exploitation: none
automatable: yes
impact: total
mission: support

Lifecycle

2020-01-06Published
2022-01-20Vendor advisory · amazon-linuxALAS2-2022-1739 — ALAS2-2022-1739 (medium): log4j
2026-05-28Last modified2 sources

Entity graph

2 nodes · 1 edges · click to pivot

CVEActorVendor advisoryIOCNews

Vendor advisories

amazon-linuxALAS2-2022-1739ALAS2-2022-1739 (medium): log4j

References

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.