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CVE-2019-18679

HIGH
7.5
CVSS Score
Published: November 26, 2019 at 04:14 PM UTC
Updated: June 17, 2026 at 02:25 AM UTC
4 products affected across 4 vendorsDebian LinuxFedoraUbuntu Linux

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Severity
HIGH7.5
Exploit prediction
EPSS 41%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
16.0418.0419.0419.10
Debian Linux· Debiandrupal
95%
8.0
Fedora· Fedora Projectrpm
95%
3031
Cache Squid· Squid Cache
95%
2.0 ≤ v ≤ 2.73.0 ≤ v ≤ 3.5.284.0 ≤ v ≤ 4.82.7 stable22.7 stable32.7 stable42.7 stable52.7 stable62.7 stable72.7 stable82.7 stable9

References (11)

x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
http://www.squid-cache.org/Advisories/SQUID-2019_11.txt
x_refsource_CONFIRMRelease Notes
Source: [email protected]
http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patch
x_refsource_CONFIRMIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.suse.com/show_bug.cgi?id=1156324
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/squid-cache/squid/pull/491
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2019/12/msg00011.html
Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200

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