peter bassill · operator
$ cve CVE-2019-12525 JSON

CVE-2019-12525

9.8
CRITICAL · CVSS 3.1 · EPSS 24.4% (pctl 98)

Patch early

EPSS 24.4% — above the 10% action threshold.

Description

An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.

Scoring

CVSS9.8 (CRITICAL, v3.1)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS24.4% — more likely to be exploited than 98% of all CVEs
WeaknessCWE-787
On CISA KEVno
Public exploitnone known
Published2019-07-11
Last modified2026-06-17

Affected (5)

VendorProduct
canonicalubuntu linux
debiandebian linux
fedoraprojectfedora
opensuseleap
squid-cachesquid

References

→ the Explorer  ·  watch your stack  ·  NVD