CVE-2019-18679
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…
- 7.5HighCVSS base score
- 43.1%Exploitation in 30 daysEPSS · top 1.3% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By mitre
- 22 days later
· 22 days later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 43.1% · top 1.3% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
11
- https://github.com/squid-cache/squid/pull/491 (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.suse.com/show_bug.cgi?id=1156324 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.squid-cache.org/Advisories/SQUID-2019_11.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patch (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-4213-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- FEDORA-2019-0b16cbdd0e (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2019-9538783033 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- [debian-lts-announce] 20191210 [SECURITY] [DLA 2028-1] squid3 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- GLSA-202003-34 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- DSA-4682 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-8395 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-18679)Record last updated .