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Traffic Server CVE-2021-27577

HIGH
HTTP Request/Response Smuggling (CWE-444)
2021-06-29 security@apache.org
Request Smuggling Apache Information Disclosure Traffic Server Debian Linux
7.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

1
CVE Published
Jun 29, 2021 - 12:15 nvd
HIGH 7.5

DescriptionNVD

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.

AnalysisAI

Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as HTTP Request/Response Smuggling (CWE-444), which allows attackers to manipulate HTTP request interpretation between frontend and backend servers. Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1. Affected products include: Apache Traffic Server, Debian Debian Linux.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Enforce strict HTTP parsing, normalize requests at proxy layer, use HTTP/2 end-to-end, reject ambiguous headers.

More in Traffic Server

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CVE-2015-3249 CRITICAL
9.8 Oct 30

The HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.1 allows remote attackers to cause a denial of
CVE-2014-3525 CRITICAL
10.0 Aug 22

Unspecified vulnerability in Apache Traffic Server 3.x through 3.2.5, 4.x before 4.2.1.1, and 5.x before 5.0.1 has unkno
CVE-2015-5206 CRITICAL
9.8 Sep 13

Unspecified vulnerability in the HTTP/2 experimental feature in Apache Traffic Server before 5.3.x before 5.3.2 has unkn
CVE-2015-5168 CRITICAL
9.8 Sep 13

Unspecified vulnerability in the HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.2 has unknown imp
CVE-2014-3624 CRITICAL
9.8 Oct 30

Apache Traffic Server 5.1.x before 5.1.1 allows remote attackers to bypass access restrictions by leveraging failure to

CVE-2021-43082 CRITICAL
9.8 Nov 03

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the stats-over-http plugin of Ap
CVE-2021-35474 CRITICAL
9.8 Jun 30

Stack-based Buffer Overflow vulnerability in cachekey plugin of Apache Traffic Server.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0
CVE-2020-1944 CRITICAL
9.8 Mar 23

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling at
CVE-2023-33934 CRITICAL
9.1 Aug 09

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.2.1. Rated critical severity
CVE-2024-35296 HIGH
8.2 Jul 26

Invalid Accept-Encoding header can cause Apache Traffic Server to fail cache lookup and force forwarding requests.0.0 th
CVE-2021-38161 HIGH
8.1 Nov 03

Improper Authentication vulnerability in TLS origin verification of Apache Traffic Server allows for man in the middle a
CVE-2017-5659 HIGH
7.5 Apr 17

Apache Traffic Server before 6.2.1 generates a coredump when there is a mismatch between content length and chunked enco

Same weakness CWE-444 – HTTP Request/Response Smuggling

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Same technique Request Smuggling

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CVE-2021-27577 vulnerability details – vuln.today
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