Multiple vulnerabilities in gRPC Swift



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-36153
CVE-2021-36154
CVE-2021-36155
CWE-ID CWE-20
CWE-400
Exploitation vector Network
Public exploit N/A
Vulnerable software
 gRPC Swift
Web applications / Modules and components for CMS

Vendor grpc

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU54654

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-36153

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incomplete internal state distinction flaw in the GRPCWebToHTTP2ServerCodec function. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

gRPC Swift: 1.1.0 - 1.1.1

CPE2.3 External links

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35267
https://github.com/grpc/grpc-swift/security/advisories/GHSA-2jx2-qcm4-rf9h
https://github.com/grpc/grpc-swift/releases


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU54655

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-36154

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to uncontrolled recursion and stack consumption flaw in the HTTP2ToRawGRPCServerCodec function. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

gRPC Swift: 1.0.0 - 1.1.1

CPE2.3 External links

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35274
https://github.com/grpc/grpc-swift/security/advisories/GHSA-4rhq-vq24-88gw
https://github.com/grpc/grpc-swift/releases


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Resource exhaustion

EUVDB-ID: #VU54656

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-36155

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources within the LengthPrefixedMessageReader function. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

gRPC Swift: 1.0.0 - 1.1.1

CPE2.3 External links

https://github.com/grpc/grpc-swift/security/advisories/GHSA-rxmj-hg9v-vp3p
https://github.com/grpc/grpc-swift/releases
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35303


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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