Vulnerability Name:

CVE-2021-36154 (CCN-205155)

Assigned:2021-07-08
Published:2021-07-08
Updated:2021-07-13
Summary:HTTP2ToRawGRPCServerCodec in gRPC Swift 1.1.1 and earlier allows remote attackers to deny service via the delivery of many small messages within a single HTTP/2 frame, leading to Uncontrolled Recursion and stack consumption.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-674
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-36154

Source: MISC
Type: Mailing List, Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35274

Source: XF
Type: UNKNOWN
grpcswift-cve202136154-dos(205155)

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/grpc/grpc-swift/releases

Source: CCN
Type: gRPC Swift GIT Repository
Uncontrolled Recursion in HTTP2ToRawGRPCServerCodec

Source: MISC
Type: Third Party Advisory
https://github.com/grpc/grpc-swift/security/advisories/GHSA-4rhq-vq24-88gw

Vulnerable Configuration:Configuration 1:
  • cpe:/a:linuxfoundation:grpc_swift:1.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:linuxfoundation:grpc_swift:1.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:linuxfoundation:grpc_swift:1.1.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    linuxfoundation grpc swift 1.0.0
    linuxfoundation grpc swift 1.1.0
    linuxfoundation grpc swift 1.1.1