Описание
Eclipse Jetty provides a web server and servlet container. In versions 11.0.0 through 11.0.15, 10.0.0 through 10.0.15, and 9.0.0 through 9.4.52, an integer overflow in MetaDataBuilder.checkSize allows for HTTP/2 HPACK header values to
exceed their size limit. MetaDataBuilder.java determines if a header name or value exceeds the size limit, and throws an exception if the limit is exceeded. However, when length is very large and huffman is true, the multiplication by 4 in line 295
will overflow, and length will become negative. (_size+length) will now be negative, and the check on line 296 will not be triggered. Furthermore, MetaDataBuilder.checkSize allows for user-entered HPACK header value sizes to be negative, potentially leading to a very large buffer allocation later on when the user-entered size is multiplied by 2. This means that if a user provides a negative length value (or, more precisely, a length value which, when multiplied by the 4/3 fudge factor, is negative), and this length value is a very large positive number when multiplied by 2, then the user can cause a very large buffer to be allocated on the server. Users of HTTP/2 can be impacted by a remote denial of service attack. The issue has been fixed in versions 11.0.16, 10.0.16, and 9.4.53. There are no known workarounds.
A flaw was found in Jetty http2-hpack and http3-qpack. If header values exceed the size limit and Huffman is the trueMetaDataBuilder.checkSize, the multiplication will overflow, and the length will become negative, causing a large buffer allocation on the server, leading to a Denial of Service (DoS) attack.
Отчет
This flaw requires a remote attacker to repeatedly send HTTP requests with HPACK, which could easily impact the server's performance or make it run out of memory. Hence, this vulnerability received an Important impact rating.
Меры по смягчению последствий
No mitigations are currently available for this vulnerability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| OpenShift Developer Tools and Services | jenkins | Affected | ||
| Red Hat Enterprise Linux 7 | jetty | Not affected | ||
| Red Hat Enterprise Linux 8 | jetty | Not affected | ||
| Red Hat Enterprise Linux 9 | jetty | Not affected | ||
| Red Hat Integration Camel Quarkus 2 | http2-hpack | Will not fix | ||
| Red Hat JBoss Fuse 6 | jetty | Out of support scope | ||
| Red Hat JBoss Fuse Service Works 6 | jetty | Out of support scope | ||
| Red Hat OpenShift Container Platform 3.11 | jenkins | Out of support scope | ||
| Red Hat OpenShift Container Platform 3.11 | jetty | Out of support scope | ||
| Red Hat OpenShift Container Platform 4 | jenkins | Affected |
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Ссылки на источники
Дополнительная информация
Статус:
7.5 High
CVSS3
Связанные уязвимости
Eclipse Jetty provides a web server and servlet container. In versions 11.0.0 through 11.0.15, 10.0.0 through 10.0.15, and 9.0.0 through 9.4.52, an integer overflow in `MetaDataBuilder.checkSize` allows for HTTP/2 HPACK header values to exceed their size limit. `MetaDataBuilder.java` determines if a header name or value exceeds the size limit, and throws an exception if the limit is exceeded. However, when length is very large and huffman is true, the multiplication by 4 in line 295 will overflow, and length will become negative. `(_size+length)` will now be negative, and the check on line 296 will not be triggered. Furthermore, `MetaDataBuilder.checkSize` allows for user-entered HPACK header value sizes to be negative, potentially leading to a very large buffer allocation later on when the user-entered size is multiplied by 2. This means that if a user provides a negative length value (or, more precisely, a length value which, when multiplied by the 4/3 fudge factor, is negative), ...
Eclipse Jetty provides a web server and servlet container. In versions 11.0.0 through 11.0.15, 10.0.0 through 10.0.15, and 9.0.0 through 9.4.52, an integer overflow in `MetaDataBuilder.checkSize` allows for HTTP/2 HPACK header values to exceed their size limit. `MetaDataBuilder.java` determines if a header name or value exceeds the size limit, and throws an exception if the limit is exceeded. However, when length is very large and huffman is true, the multiplication by 4 in line 295 will overflow, and length will become negative. `(_size+length)` will now be negative, and the check on line 296 will not be triggered. Furthermore, `MetaDataBuilder.checkSize` allows for user-entered HPACK header value sizes to be negative, potentially leading to a very large buffer allocation later on when the user-entered size is multiplied by 2. This means that if a user provides a negative length value (or, more precisely, a length value which, when multiplied by the 4/3 fudge factor, is negative), and
Eclipse Jetty provides a web server and servlet container. In versions ...
HTTP/2 HPACK integer overflow and buffer allocation
7.5 High
CVSS3