5.9

CVE-2019-12521

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Squid-cache ≫ Squid Version >= 3.0 <= 3.5.28
Squid-cache ≫ Squid Version >= 4.0 <= 4.7
Squid-cache ≫ Squid Version >= 5.0 <= 5.0.1
Canonical ≫ Ubuntu Linux Version16.04 SwEditionlts
Canonical ≫ Ubuntu Linux Version18.04 SwEditionlts
Canonical ≫ Ubuntu Linux Version19.10
Canonical ≫ Ubuntu Linux Version20.04 SwEditionlts
Debian ≫ Debian Linux Version9.0
Debian ≫ Debian Linux Version10.0
Opensuse ≫ Leap Version15.1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 5.77% 0.921
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.9 2.2 3.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd@nist.gov 4.3 8.6 2.9
AV:N/AC:M/Au:N/C:N/I:N/A:P
CWE-193 Off-by-one Error

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
Third Party Advisory
Mailing List
https://www.debian.org/security/2020/dsa-4682
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html
Third Party Advisory
Mailing List
https://usn.ubuntu.com/4356-1/
Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/04/23/1
Patch
Third Party Advisory
Mailing List
https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12521.txt
Third Party Advisory
https://security.gentoo.org/glsa/202005-05
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0006/
Third Party Advisory