CVE-2019-12519

Public on 2020-06-01
Modified on 2020-07-15
Description
A flaw was found in Squid through version 4.7. When handling the tag esi:when, when ESI is enabled, Squid calls the ESIExpression::Evaluate function which uses a fixed stack buffer to hold the expression. While processing the expression, there is no check to ensure that the stack won't overflow. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Severity
Important
CVSS v3 Base Score
8.1
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 squid 2020-06-26 22:56 ALAS2-2020-1448
Amazon Linux 1 squid 2020-06-23 06:08 ALAS-2020-1386
Amazon Linux 1 squid 2020-06-01 12:25 ALAS-2020-1378
Amazon Linux 1 squid 2020-06-23 06:08 ALAS-2020-1386
Amazon Linux 1 squid 2020-06-01 12:25 ALAS-2020-1378

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
NVD CVSSv3 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H