Reading unbounded number of HTTP/2 CONTINUATION frames to cause excessive CPU usage

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Summary

CVECVE-2024-28182
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-04-04 15:15:38 UTC
Updated2026-10-15 01:17:41 UTC
Descriptionnghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. The nghttp2 library prior to version 1.61.0 keeps reading the unbounded number of HTTP/2 CONTINUATION frames even after a stream is reset to keep HPACK context in sync. This causes excessive CPU usage to decode HPACK stream. nghttp2 v1.61.0 mitigates this vulnerability by limiting the number of CONTINUATION frames it accepts per stream. There is no workaround for this vulnerability.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

Problem Types: CWE-770 | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 11.0 All All All
Operating System Fedoraproject Fedora 38 All All All
Operating System Fedoraproject Fedora 39 All All All
Operating System Fedoraproject Fedora 40 All All All
Application Nghttp2 Nghttp2 All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nghttp2 Nghttp2 affected < 1.61.0 Not specified
ADP Nghttp2 Nghttp2 affected 1.61.0 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SINEC NMS affected V3.0 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
github.com/nghttp2/nghttp2/commit/d71a4668c6bead55805d18810d633fbb98315af9 af854a3a-2127-422b-91ae-364da2661108 github.com Patch
github.com/nghttp2/nghttp2/commit/00201ecd8f982da3b67d4f6868af72a1b03b14e0 af854a3a-2127-422b-91ae-364da2661108 github.com Patch
lists.debian.org/debian-lts-announce/2024/09/msg00041.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
lists.debian.org/debian-lts-announce/2024/04/msg00026.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
github.com/nghttp2/nghttp2/security/advisories/GHSA-x6x3-gv8h-m57q af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
cert-portal.siemens.com/productcert/html/ssa-784301.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
www.openwall.com/lists/oss-security/2024/04/03/16 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
www.kb.cert.org/vuls/id/421644 af854a3a-2127-422b-91ae-364da2661108 www.kb.cert.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 44179 Arista EOS Multiple Security Vulnerabilities (SA0094)
  • 756078 SUSE Enterprise Linux Security Update for nghttp2 (SUSE-SU-2024:1156-1)
  • 756088 SUSE Enterprise Linux Security Update for nghttp2 (SUSE-SU-2024:1167-1)

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