CVEs / CVE-2019-18679
CVE-2019-18679: n/a n/a vulnerability
- high 7.5 CVSS 3.1 (NVD)
- EPSS 43% chance of exploitation in the next 30 days, higher than 98% of CVEs (8 Nov 2026)
- Last changed at its sources
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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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
Not in the CISA Known Exploited Vulnerabilities catalog as of 6 Nov 2026.
Severity
| CVSS 3.1 | 7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NScored by NVD |
|---|---|
| Weakness | CWE-200 |
References
- CVE-2019-18679 on NVD
- CVE-2019-18679 on OSV
- http://www.squid-cache.org/Advisories/SQUID-2019_11.txt Third Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patch Release Notes
- https://bugzilla.suse.com/show_bug.cgi?id=1156324 Issue Tracking, Third Party Advisory
- https://github.com/squid-cache/squid/pull/491 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00011.html Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/
- https://security.gentoo.org/glsa/202003-34
- https://usn.ubuntu.com/4213-1/ Third Party Advisory
- https://www.debian.org/security/2020/dsa-4682
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.