h2o: buffer overflow when using the %{error}x log directive
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| h2o | h2o | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||
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| H2o | H2o |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.321% probability within 30 days)
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
H2o
H2o h2o |
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| Vendors & Products |
H2o
H2o h2o |
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| Description | h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 48b7ae12107fd2b118e4641da49599e9aac8edd8, H2O's access-log formatter could write past its log-line buffer when an affected custom access-log format was configured. The allocation errors affected %{error}x, %q when the query string was empty, and numeric elements whose temporary terminating NUL reached the end of the buffer. A matching request could crash the server, while the effect of the one-byte NUL overwrite beyond a crash was not established. This vulnerability is fixed with commit 48b7ae12107fd2b118e4641da49599e9aac8edd8. | |
| Title | h2o: buffer overflow when using the %{error}x log directive | |
| Weaknesses | CWE-787 | |
| References |
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| Metrics |
cvssV3_1
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