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Vulnerability Instance

Lookup for vulnerabilities affecting packages.

Vulnerability_idVCID-vgst-7jj7-cuet
Summaryh2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service attack. By default, the h2o standalone server automatically restarts, minimizing the impact. However, HTTP requests that were served concurrently will still be disrupted. The vulnerability has been addressed in commit 1ed32b2. Users may disable the use of HTTP/3 to mitigate the issue.
Aliases
0
alias CVE-2024-45403
Fixed_packages
0
url pkg:deb/debian/h2o@0?distro=bullseye
purl pkg:deb/debian/h2o@0?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@0%3Fdistro=bullseye
1
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-6?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-6%3Fdistro=bullseye
2
url pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
purl pkg:deb/debian/h2o@2.2.5%2Bdfsg2-7?distro=bullseye
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:deb/debian/h2o@2.2.5%252Bdfsg2-7%3Fdistro=bullseye
Affected_packages
References
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2024-45403
reference_id
reference_type
scores
0
value 0.0033
scoring_system epss
scoring_elements 0.56018
published_at 2026-04-21T12:55:00Z
1
value 0.0033
scoring_system epss
scoring_elements 0.56001
published_at 2026-04-04T12:55:00Z
2
value 0.0033
scoring_system epss
scoring_elements 0.56031
published_at 2026-04-08T12:55:00Z
3
value 0.0033
scoring_system epss
scoring_elements 0.56034
published_at 2026-04-09T12:55:00Z
4
value 0.0033
scoring_system epss
scoring_elements 0.56044
published_at 2026-04-11T12:55:00Z
5
value 0.0033
scoring_system epss
scoring_elements 0.56024
published_at 2026-04-12T12:55:00Z
6
value 0.0033
scoring_system epss
scoring_elements 0.56006
published_at 2026-04-13T12:55:00Z
7
value 0.0033
scoring_system epss
scoring_elements 0.56042
published_at 2026-04-16T12:55:00Z
8
value 0.0033
scoring_system epss
scoring_elements 0.56045
published_at 2026-04-18T12:55:00Z
9
value 0.0033
scoring_system epss
scoring_elements 0.5598
published_at 2026-04-07T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2024-45403
1
reference_url https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562
reference_id 16b13eee8ad7895b4fe3fcbcabee53bd52782562
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-11T14:40:44Z/
url https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562
2
reference_url https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c
reference_id 1ed32b23f999acf0c5029f09c8525f93eb1d354c
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-11T14:40:44Z/
url https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c
3
reference_url https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92
reference_id GHSA-4xp5-3jhc-3m92
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-11T14:40:44Z/
url https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92
4
reference_url https://h2o.examp1e.net/configure/http3_directives.html
reference_id http3_directives.html
reference_type
scores
0
value 3.7
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
1
value Track
scoring_system ssvc
scoring_elements SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-10-11T14:40:44Z/
url https://h2o.examp1e.net/configure/http3_directives.html
Weaknesses
0
cwe_id 617
name Reachable Assertion
description The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
Exploits
Severity_range_score3.7 - 3.7
Exploitabilitynull
Weighted_severitynull
Risk_scorenull
Resource_urlhttp://public2.vulnerablecode.io/vulnerabilities/VCID-vgst-7jj7-cuet