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Known exploited vulnerability

CVE-2023-44487

highCVSS 3.1 7.5In CISA KEVEPSS 100%Published · n/a

The short answer

CVE-2023-44487 affects n/a n/a and is rated high (CVSS 7.5). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-10-10: attackers are using it, so patch it first. Fixed versions are published for github.com/apple/swift-nio-http2 (1.28.0) and golang.org/x/net (0.17.0).

What it is

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

Weakness: CWE-400.

Severity

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploited (CISA KEV)

Yes, since Oct 10, 2023

Federal due date Oct 31, 2023

EPSS, next 30 days

100%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

What CISA says to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Affected packages and fixed versions

PackageEcosystemFixed inAdvisory
github.com/apple/swift-nio-http2SwiftURL1.28.0GHSA-qppj-fm5r-hxr3
golang.org/x/netGo0.17.0GHSA-qppj-fm5r-hxr3
org.apache.tomcat:tomcat-coyoteMaven11.0.0-M12, 10.1.14, 9.0.81, 8.5.94GHSA-qppj-fm5r-hxr3
org.apache.tomcat.embed:tomcat-embed-coreMaven11.0.0-M12, 10.1.14, 9.0.81, 8.5.94GHSA-qppj-fm5r-hxr3
org.eclipse.jetty.http2:http2-commonMaven9.4.53, 10.0.17, 11.0.17GHSA-qppj-fm5r-hxr3
org.eclipse.jetty.http2:http2-serverMaven9.4.53, 10.0.17, 11.0.17GHSA-qppj-fm5r-hxr3
org.eclipse.jetty.http2:jetty-http2-commonMaven12.0.2GHSA-qppj-fm5r-hxr3
org.eclipse.jetty.http2:jetty-http2-serverMaven12.0.2GHSA-qppj-fm5r-hxr3
com.typesafe.akka:akka-http-coreMaven10.5.3GHSA-qppj-fm5r-hxr3
com.typesafe.akka:akka-http-core_2.13Maven10.5.3GHSA-qppj-fm5r-hxr3
com.typesafe.akka:akka-http-core_2.12Maven10.5.3GHSA-qppj-fm5r-hxr3
com.typesafe.akka:akka-http-core_2.11MavenNo fix yetGHSA-qppj-fm5r-hxr3

Is it in your code? Drop your lockfile into the free vulnerability check, or let vulnerability watch check your repository every day and open the upgrade as a pull request.

Affected products

n/a, http, RUGGEDCOM APE1808, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SINEC NMS, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-44487 being exploited?

Yes. CISA added CVE-2023-44487 to its Known Exploited Vulnerabilities catalog on 2023-10-10, with a federal remediation due date of 2023-10-31.

How do I fix CVE-2023-44487?

Upgrade to a fixed version: github.com/apple/swift-nio-http2 (SwiftURL) 1.28.0; golang.org/x/net (Go) 0.17.0; org.apache.tomcat:tomcat-coyote (Maven) 11.0.0-M12 or 10.1.14 or 9.0.81 or 8.5.94; org.apache.tomcat.embed:tomcat-embed-core (Maven) 11.0.0-M12 or 10.1.14 or 9.0.81 or 8.5.94. CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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