Apache Traffic Server up to 9.1.2 Header Parser request smuggling

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.9$5k-$25k0.00

Summaryinfo

A vulnerability classified as critical has been found in Apache Traffic Server up to 9.1.2. The impacted element is an unknown function of the component Header Parser. Performing a manipulation results in request smuggling. This vulnerability is reported as CVE-2021-37150. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in Apache Traffic Server up to 9.1.2. This affects some unknown processing of the component Header Parser. The manipulation with an unknown input leads to a request smuggling vulnerability. CWE is classifying the issue as CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Improper Input Validation vulnerability in header parsing of Apache Traffic Server allows an attacker to request secure resources. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.

The weakness was disclosed 08/10/2022. The advisory is shared at lists.apache.org. This vulnerability is uniquely identified as CVE-2021-37150 since 07/21/2021. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/08/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Request smuggling
CWE: CWE-444
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/21/2021 🔍
08/10/2022 +385 days 🔍
08/10/2022 +0 days 🔍
09/08/2025 +1125 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: FEDORA-2022-23043f5a0b
Status: Confirmed

CVE: CVE-2021-37150 (🔍)
GCVE (CVE): GCVE-0-2021-37150
GCVE (VulDB): GCVE-100-206037

Entryinfo

Created: 08/10/2022 13:21
Updated: 09/08/2025 22:24
Changes: 08/10/2022 13:21 (38), 09/04/2022 11:20 (1), 09/04/2022 11:27 (11), 09/08/2025 22:24 (15)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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