Http2 vulnerabilitiesAnd the versions its exploited flaws hit.
Http2 is made by Golang. We track 4 published vulnerabilities in it, across 17 versions. 1 of them is on the list of flaws known to be exploited, the newest added on 10 October 2023. If you run Http2, check your version against the exploited flaws below and patch those first.
The most recent Http2 flaw added to the known-exploited list is CVE-2023-44487, on 10 October 2023. We keep watching the known-exploited list.
Which versions of Http2 do the exploited flaws hit?
Each exploited flaw lists the versions it affects, usually as ranges. "before 0.17.0" means every version up to, but not including, 0.17.0. Find your version, then patch.
- CVE-2023-44487Exploited list, 10 Oct 2023
HTTP/2 Rapid Reset Attack Vulnerability
before 0.17.0
Which Http2 vulnerabilities are being exploited?
1 flaw is on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 7.5HTTP/2 Rapid Reset Attack Vulnerability
HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
Which Http2 flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- >99%
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.
- 6.1%CVE-2022-41717Medium
An attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests.
- 4.6%CVE-2022-41723High
A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, sufficient to cause a denial of service from a small number of small requests.
- 3.8%CVE-2023-39325High
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption.
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1 flaw being exploited affects software Acme tracks
HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
- Matched to
- Http2 on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 4 published vulnerabilities listed under the name Http2, across 17 versions. The most recent Http2 flaw added to the known-exploited list is CVE-2023-44487, on 10 October 2023.
1 is on the list of flaws known to be exploited. The most recently added is CVE-2023-44487.
Each flaw names its own versions, usually as ranges. The newest, CVE-2023-44487, affects before 0.17.0. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Http2. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.