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CVE-2019-18679

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Date: November 26, 2019

An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR protections and may aid attackers isolating memory areas to target for remote code execution attacks.

Language: C

Severity Score

Related Resources (19)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/
http://www.squid-cache.org/Advisories/SQUID-2019_11.txt
https://access.redhat.com/security/cve/CVE-2019-18679
https://nvd.nist.gov/vuln/detail/CVE-2019-18679
https://security-tracker.debian.org/tracker/CVE-2019-18679
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/
http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patch
https://lists.debian.org/debian-lts-announce/2019/12/msg00011.html
https://www.debian.org/security/2020/dsa-4682
https://security.gentoo.org/glsa/202003-34
https://usn.ubuntu.com/4213-1/
https://github.com/squid-cache/squid/pull/491
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-18679
https://security.alpinelinux.org/vuln/CVE-2019-18679
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
https://bugzilla.suse.com/show_bug.cgi?id=1156324
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/
https://www.mend.io/vulnerability-database/CVE-2019-18679

Severity Score

Weakness Type (CWE)

Information Leak / Disclosure

CWE-200

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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