CVE-2019-12521
- State
- Published
- Severity
- Not scored
- Published
- Apr 15, 2020
- Updated
- Aug 4, 2024
- Reserved
- Jun 2, 2019
Description
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.
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12521.txt
- [oss-security] 20200423 [ADVISORY] SQUID-2019:12 Multiple issues in ESI Response processingmailing-list
- DSA-4682vendor-advisory
- openSUSE-SU-2020:0623vendor-advisory
- GLSA-202005-05vendor-advisory
- USN-4356-1vendor-advisory
- [debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security updatemailing-list
- https://security.netapp.com/advisory/ntap-20210205-0006/
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