Описание
A HTTP/2 implementation built using any version of the Python HPACK library between v1.0.0 and v2.2.0 could be targeted for a denial of service attack, specifically a so-called "HPACK Bomb" attack. This attack occurs when an attacker inserts a header field that is exactly the size of the HPACK dynamic header table into the dynamic header table. The attacker can then send a header block that is simply repeated requests to expand that field in the dynamic table. This can lead to a gigantic compression ratio of 4,096 or better, meaning that 16kB of data can decompress to 64MB of data on the target machine.
| Релиз | Статус | Примечание |
|---|---|---|
| artful | ignored | end of life |
| bionic | not-affected | |
| cosmic | not-affected | |
| devel | not-affected | |
| disco | not-affected | |
| eoan | not-affected | |
| esm-apps/bionic | not-affected | |
| esm-apps/focal | not-affected | |
| esm-apps/jammy | not-affected | |
| esm-apps/noble | not-affected |
Показывать по
EPSS
7.8 High
CVSS2
7.5 High
CVSS3
Связанные уязвимости
A HTTP/2 implementation built using any version of the Python HPACK library between v1.0.0 and v2.2.0 could be targeted for a denial of service attack, specifically a so-called "HPACK Bomb" attack. This attack occurs when an attacker inserts a header field that is exactly the size of the HPACK dynamic header table into the dynamic header table. The attacker can then send a header block that is simply repeated requests to expand that field in the dynamic table. This can lead to a gigantic compression ratio of 4,096 or better, meaning that 16kB of data can decompress to 64MB of data on the target machine.
A HTTP/2 implementation built using any version of the Python HPACK li ...
HPACK Denial of Service vulnerability (HPACK Bomb)
EPSS
7.8 High
CVSS2
7.5 High
CVSS3