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veracodeVeracode Vulnerability DatabaseVERACODE:27113
HistorySep 21, 2020 - 6:36 a.m.

Buffer Overflow

2020-09-2106:36:05
Veracode Vulnerability Database
sca.analysiscenter.veracode.com
13

0.034 Low

EPSS

Percentile

91.4%

squid:eoan is vulnerable to buffer overflow. An issue was discovered in Squid 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.