PT-2019-5185 · Squid+7 · Squid+8

Kristoffer Danielsson · Published 2019-11-14 · Updated 2024-06-15 · CVE-2019-18677

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Squid versions 3.x through 4.8

Description The issue arises when the append domain setting is used, due to improper interaction between appended characters and hostname length restrictions, leading to incorrect message processing. This can cause traffic to be inappropriately redirected to unintended origins. The vulnerability in the append domain parameter of the Squid proxy server is related to shortcomings in the mechanisms against cross-site forgery, allowing a remote attacker to access and compromise confidential data.

Recommendations For Squid versions 3.x through 4.8, consider disabling the append domain setting as a temporary workaround until a patch is available. Restrict access to the Squid proxy server to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

CSRF

Weakness Enumeration

CWE-352

Related Identifiers

ALSA-2020:4743

ALT-PU-2020-1479

ALT-PU-2020-1494

BDU:2020-01858

CESA-2020_4743

CVE-2019-18677

DLA-2028-1

DLA-2278-1

DSA-4682-1

MGASA-2019-0382

OPENSUSE-SU-2019:2540-1

OPENSUSE-SU-2019:2541-1

OPENSUSE-SU-2019_2540-1

OPENSUSE-SU-2019_2541-1

OPENSUSE-SU-2024:11403-1

RHSA-2020:4743

RHSA-2020_4743

RLSA-2020:4743

SUSE-SU-2019:2975-1

SUSE-SU-2019:3067-1

SUSE-SU-2020:0661-1

SUSE-SU-2020:14460-1

USN-4213-1

Affected Products

Alt Linux

Almalinux

Centos

Red Hat

Rocky Linux

Squid

Squid Cache

Suse

Ubuntu

References · 164

• https://github.com/squid-cache/squid/pull/427 · Patch
• https://osv.dev/vulnerability/MGASA-2019-0382 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:0661-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-18677 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-18677 · Security Note
• https://usn.ubuntu.com/4213-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20211019SE81 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-18679 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2020:14460-1 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2020-4743.html · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-01858 · Security Note
• https://ubuntu.com/security/CVE-2019-12854 · Vendor Advisory
• https://osv.dev/vulnerability/USN-4213-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11403-1 · Vendor Advisory