Total vulnerabilities in the database
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.
| Software | From | Fixed in |
|---|---|---|
| squid-cache / squid | 3.0 | 3.5.28.x |
| squid-cache / squid | 4.0 | 4.7.x |
| squid-cache / squid | 5.0 | 5.0.1.x |
| canonical / ubuntu_linux | 16.04 | 16.04.x |
| canonical / ubuntu_linux | 18.04 | 18.04.x |
| canonical / ubuntu_linux | 19.10 | 19.10.x |
| canonical / ubuntu_linux | 20.04 | 20.04.x |
| debian / debian_linux | 9.0 | 9.0.x |
| debian / debian_linux | 10.0 | 10.0.x |
| opensuse / leap | 15.1 | 15.1.x |