Squid Web Proxy up to 3.x/4.8 URL Request Header request smuggling

CVSS Meta Temp Score
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CTI Interest Score
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6.3$5k-$25k0.00

A vulnerability, which was classified as critical, has been found in Squid Web Proxy up to 3.x/4.8 (Firewall Software). Affected by this issue is some unknown processing of the component URL Handler. The manipulation as part of a Request Header leads to a request smuggling vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed 11/26/2019 (Website). The advisory is shared for download at squid-cache.org. This vulnerability is handled as CVE-2019-18678 since 11/04/2019. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 02/28/2024).

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

The entries 146433, 146431 and 146430 are pretty similar.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Request smuggling
CWE: CWE-444
ATT&CK: Unknown

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: 🔍

Patch: github.com

Timelineinfo

11/04/2019 🔍
11/26/2019 +22 days 🔍
11/27/2019 +1 days 🔍
02/28/2024 +1554 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: USN-4213-1
Status: Not defined

CVE: CVE-2019-18678 (🔍)
See also: 🔍

Entryinfo

Created: 11/27/2019 08:54
Updated: 02/28/2024 14:40
Changes: 11/27/2019 08:54 (39), 11/27/2019 08:59 (18), 02/28/2024 14:40 (4)
Complete: 🔍

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