CVE-2023-45802Not scoredCWE-404

CVE-2023-45802: Apache HTTP Server: HTTP/2 stream memory not reclaimed right away on RST

Apache Software Foundation · Apache HTTP Server

Vendor fix available · Affected: Apache Software Foundation Apache HTTP Server · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

3.2%probability of exploitation in the next 30 days

88th percentile

050100

Higher than 88% of scored CVEs

Not scored yet. The CVE record carries no CVSS score.

DescriptionCVE.org

When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that. This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out. Users are recommended to upgrade to version 2.4.58, which fixes the issue.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Apache Software Foundation · Apache HTTP Serverfrom 2.4.17 up to and including 2.4.57

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Improper Resource Shutdown or Release · Denial of Service
Vendor: Apache Software Foundation
Published: October 2023
Band: Possible (1 to 10%), October 2023

CoverageNo articles yet

No CyberSIXT article names CVE-2023-45802 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.