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CVE-2019-18678

Public on 2019-11-26
Modified on 2024-03-08
Description

An issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing whitespace between a header name and a colon.

Severity
Medium
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CVSS v3 Base Score
5.3
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core squid 2023-10-25 21:40 ALAS2-2023-2318
Amazon Linux 2 - Squid4 Extra squid 2023-08-21 20:59 ALAS2SQUID4-2023-007

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD CVSSv2 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
NVD CVSSv3 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

Red Hat: CVE-2019-18678 Mitre: CVE-2019-18678 FAQs regarding Amazon Linux ALAS/CVE Severity