UBUNTU-CVE-2021-3595

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Source
https://ubuntu.com/security/CVE-2021-3595
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3595.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-3595
Upstream
Downstream
Related
Published
2021-06-15T21:15:00Z
Modified
2025-09-08T16:46:45Z
Severity
  • 3.8 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftpinput() function and could occur while processing a udp packet that is smaller than the size of the 'tftpt' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.

References

Affected packages

Ubuntu:18.04:LTS / qemu

Package

Name
qemu
Purl
pkg:deb/ubuntu/qemu@1:2.11+dfsg-1ubuntu7.37?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.11+dfsg-1ubuntu7.37

Affected versions

1:2.*

1:2.10+dfsg-0ubuntu3
1:2.10+dfsg-0ubuntu4
1:2.10+dfsg-0ubuntu5
1:2.11+dfsg-1ubuntu1
1:2.11+dfsg-1ubuntu2
1:2.11+dfsg-1ubuntu4
1:2.11+dfsg-1ubuntu5
1:2.11+dfsg-1ubuntu6
1:2.11+dfsg-1ubuntu7
1:2.11+dfsg-1ubuntu7.1
1:2.11+dfsg-1ubuntu7.2
1:2.11+dfsg-1ubuntu7.3
1:2.11+dfsg-1ubuntu7.4
1:2.11+dfsg-1ubuntu7.5
1:2.11+dfsg-1ubuntu7.6
1:2.11+dfsg-1ubuntu7.7
1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.9
1:2.11+dfsg-1ubuntu7.10
1:2.11+dfsg-1ubuntu7.12
1:2.11+dfsg-1ubuntu7.13
1:2.11+dfsg-1ubuntu7.14
1:2.11+dfsg-1ubuntu7.15
1:2.11+dfsg-1ubuntu7.17
1:2.11+dfsg-1ubuntu7.18
1:2.11+dfsg-1ubuntu7.19
1:2.11+dfsg-1ubuntu7.20
1:2.11+dfsg-1ubuntu7.21
1:2.11+dfsg-1ubuntu7.22
1:2.11+dfsg-1ubuntu7.23
1:2.11+dfsg-1ubuntu7.25
1:2.11+dfsg-1ubuntu7.26
1:2.11+dfsg-1ubuntu7.27
1:2.11+dfsg-1ubuntu7.28
1:2.11+dfsg-1ubuntu7.29
1:2.11+dfsg-1ubuntu7.31
1:2.11+dfsg-1ubuntu7.32
1:2.11+dfsg-1ubuntu7.33
1:2.11+dfsg-1ubuntu7.34
1:2.11+dfsg-1ubuntu7.35
1:2.11+dfsg-1ubuntu7.36

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "qemu",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-kvm",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system-common",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-user",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-user-static",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        },
        {
            "binary_name": "qemu-utils",
            "binary_version": "1:2.11+dfsg-1ubuntu7.37"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:20.04:LTS / libslirp

Package

Name
libslirp
Purl
pkg:deb/ubuntu/libslirp@4.1.0-2ubuntu2.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.1.0-2ubuntu2.2

Affected versions

4.*

4.0.0-1
4.0.0-2
4.1.0-1
4.1.0-2
4.1.0-2ubuntu1
4.1.0-2ubuntu2
4.1.0-2ubuntu2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libslirp-dev",
            "binary_version": "4.1.0-2ubuntu2.2"
        },
        {
            "binary_name": "libslirp0",
            "binary_version": "4.1.0-2ubuntu2.2"
        }
    ],
    "availability": "No subscription required"
}

Ubuntu:22.04:LTS / libslirp

Package

Name
libslirp
Purl
pkg:deb/ubuntu/libslirp@4.6.1-1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.6.1-1

Affected versions

4.*

4.4.0-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libslirp-dev",
            "binary_version": "4.6.1-1"
        },
        {
            "binary_name": "libslirp0",
            "binary_version": "4.6.1-1"
        }
    ],
    "availability": "No subscription required"
}