CVE-2020-8517

An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
http://www.squid-cache.org/Advisories/SQUID-2020_3.txt	Vendor Advisory
http://www.squid-cache.org/Versions/v4/changesets/squid-4-6982f1187a26557e582172965e266f544ea562a5.patch	Patch Vendor Advisory
https://usn.ubuntu.com/4289-1/	Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00012.html	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202003-34	Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00010.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20210304-0002/	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::*

Information

Published : 2020-02-04 12:15

Updated : 2021-07-21 04:39

NVD link : CVE-2020-8517

Mitre link : CVE-2020-8517

JSON object : View

CWE

CWE-787

Out-of-bounds Write

CWE-20

Improper Input Validation

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Products Affected

canonical

ubuntu_linux

opensuse

leap

squid-cache

squid

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