UBUNTU-CVE-2023-48230

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Source
https://ubuntu.com/security/CVE-2023-48230
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-48230.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2023-48230
Related
Published
2023-11-21T21:15:00Z
Modified
2024-10-15T14:11:50Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

Cap'n Proto is a data interchange format and capability-based RPC system. In versions 1.0 and 1.0.1, when using the KJ HTTP library with WebSocket compression enabled, a buffer underrun can be caused by a remote peer. The underrun always writes a constant value that is not attacker-controlled, likely resulting in a crash, enabling a remote denial-of-service attack. Most Cap'n Proto and KJ users are unlikely to have this functionality enabled and so unlikely to be affected. Maintainers suspect only the Cloudflare Workers Runtime is affected. If KJ HTTP is used with WebSocket compression enabled, a malicious peer may be able to cause a buffer underrun on a heap-allocated buffer. KJ HTTP is an optional library bundled with Cap'n Proto, but is not directly used by Cap'n Proto. WebSocket compression is disabled by default. It must be enabled via a setting passed to the KJ HTTP library via HttpClientSettings or HttpServerSettings. The bytes written out-of-bounds are always a specific constant 4-byte string { 0x00, 0x00, 0xFF, 0xFF }. Because this string is not controlled by the attacker, maintainers believe it is unlikely that remote code execution is possible. However, it cannot be ruled out. This functionality first appeared in Cap'n Proto 1.0. Previous versions are not affected. This issue is fixed in Cap'n Proto 1.0.1.1.

References

Affected packages

Ubuntu:20.04:LTS / capnproto

Package

Name
capnproto
Purl
pkg:deb/ubuntu/capnproto?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.7.0-6

Affected versions

0.*

0.7.0-5
0.7.0-5build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "0.7.0-6",
            "binary_name": "capnproto"
        },
        {
            "binary_version": "0.7.0-6",
            "binary_name": "capnproto-dbgsym"
        },
        {
            "binary_version": "0.7.0-6",
            "binary_name": "libcapnp-0.7.0"
        },
        {
            "binary_version": "0.7.0-6",
            "binary_name": "libcapnp-0.7.0-dbgsym"
        },
        {
            "binary_version": "0.7.0-6",
            "binary_name": "libcapnp-dev"
        }
    ]
}

Ubuntu:22.04:LTS / capnproto

Package

Name
capnproto
Purl
pkg:deb/ubuntu/capnproto?arch=src?distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8.0-2ubuntu2

Affected versions

0.*

0.7.0-7build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "0.8.0-2ubuntu2",
            "binary_name": "capnproto"
        },
        {
            "binary_version": "0.8.0-2ubuntu2",
            "binary_name": "capnproto-dbgsym"
        },
        {
            "binary_version": "0.8.0-2ubuntu2",
            "binary_name": "libcapnp-0.8.0"
        },
        {
            "binary_version": "0.8.0-2ubuntu2",
            "binary_name": "libcapnp-0.8.0-dbgsym"
        },
        {
            "binary_version": "0.8.0-2ubuntu2",
            "binary_name": "libcapnp-dev"
        }
    ]
}

Ubuntu:24.10 / capnproto

Package

Name
capnproto
Purl
pkg:deb/ubuntu/capnproto?arch=src?distro=oracular

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.1-4

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:24.04:LTS / capnproto

Package

Name
capnproto
Purl
pkg:deb/ubuntu/capnproto?arch=src?distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.2-3

1.*

1.0.1-2
1.0.1-3
1.0.1-4

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}