CVE-2019-18679
Due to incorrect data management, it is vulnerable to information disclosure when processing HTTP Digest Authentication.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 41.0%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 40.98% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- squid-cache/squid · canonical/ubuntu linux · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
EPSS 41.0% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.squid-cache.org/Advisories/SQUID-2019_11.txtThird Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patchRelease Notes
- https://bugzilla.suse.com/show_bug.cgi?id=1156324Issue Tracking, Third Party Advisory
- https://github.com/squid-cache/squid/pull/491Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00011.htmlThird 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
- http://www.squid-cache.org/Advisories/SQUID-2019_11.txtThird Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-671ba97abe929156dc4c717ee52ad22fba0f7443.patchRelease Notes
- https://bugzilla.suse.com/show_bug.cgi?id=1156324Issue Tracking, Third Party Advisory
- https://github.com/squid-cache/squid/pull/491Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00011.htmlThird 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.