Описание
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
| Релиз | Статус | Примечание |
|---|---|---|
| bionic | DNE | |
| devel | released | 4.10-1ubuntu2 |
| eoan | released | 4.8-1ubuntu2.3 |
| esm-infra-legacy/trusty | DNE | |
| esm-infra/focal | not-affected | 4.10-1ubuntu1.1 |
| focal | released | 4.10-1ubuntu1.1 |
| groovy | released | 4.10-1ubuntu2 |
| hirsute | released | 4.10-1ubuntu2 |
| precise/esm | DNE | |
| trusty | ignored | end of standard support |
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| Релиз | Статус | Примечание |
|---|---|---|
| bionic | released | 3.5.27-1ubuntu1.6 |
| devel | DNE | |
| eoan | DNE | |
| esm-infra-legacy/trusty | DNE | |
| esm-infra/bionic | not-affected | 3.5.27-1ubuntu1.6 |
| esm-infra/focal | DNE | |
| esm-infra/xenial | not-affected | 3.5.12-1ubuntu7.11 |
| focal | DNE | |
| groovy | DNE | |
| hirsute | DNE |
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EPSS
4.3 Medium
CVSS2
5.9 Medium
CVSS3
Связанные уязвимости
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
An issue was discovered in Squid through 4.7. When Squid is parsing ES ...
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
Уязвимость механизма обработки элементов ESI прокси-сервера Squid, связанная с выходом операции за допустимые границы буфера данных, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
4.3 Medium
CVSS2
5.9 Medium
CVSS3