Vulnerability in Apache Traffic Server
CVE-2021-27577
Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
Vulnerability class: HTTP Request Smuggling
EPSS: 0.035 (88.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Apache Traffic_server
- Apache Software Foundation Traffic Server — versions Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1
- Debian Debian_linux — versions 8.0
Weakness classification (CWE)
References
- security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
- security@apache.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2021-27577?
- CVE-2021-27577 is a high-severity vulnerability in Apache Traffic Server, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2021-06-29.
- How severe is CVE-2021-27577?
- High severity. CVSS v3 base score is 7.5 out of 10.