UBUNTU-CVE-2021-3999

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-3999
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3999.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3999
Upstream
Downstream
Related
Published
2022-02-01T00:00:00Z
Modified
2025-07-18T16:46:31Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.

References

Affected packages

Ubuntu:Pro:14.04:LTS / eglibc

Package

Name
eglibc
Purl
pkg:deb/ubuntu/eglibc@2.19-0ubuntu6.15+esm3?arch=source&distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.19-0ubuntu6.15+esm3

Affected versions

2.*

2.17-93ubuntu4
2.18-0ubuntu1
2.18-0ubuntu2
2.18-0ubuntu4
2.18-0ubuntu5
2.18-0ubuntu6
2.18-0ubuntu7
2.19-0ubuntu2
2.19-0ubuntu3
2.19-0ubuntu4
2.19-0ubuntu5
2.19-0ubuntu6
2.19-0ubuntu6.1
2.19-0ubuntu6.3
2.19-0ubuntu6.4
2.19-0ubuntu6.5
2.19-0ubuntu6.6
2.19-0ubuntu6.7
2.19-0ubuntu6.8
2.19-0ubuntu6.9
2.19-0ubuntu6.10
2.19-0ubuntu6.11
2.19-0ubuntu6.13
2.19-0ubuntu6.14
2.19-0ubuntu6.15
2.19-0ubuntu6.15+esm1
2.19-0ubuntu6.15+esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "eglibc-source",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "glibc-doc",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-armel-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-dbg",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-prof",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-udeb",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-udeb-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libnss-dns-udeb",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libnss-dns-udeb-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libnss-files-udeb",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "libnss-files-udeb-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        },
        {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.19-0ubuntu6.15+esm3"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.23-0ubuntu11.3+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.23-0ubuntu11.3+esm1

Affected versions

2.*

2.21-0ubuntu4
2.21-0ubuntu5
2.21-0ubuntu6
2.23-0ubuntu1
2.23-0ubuntu2
2.23-0ubuntu3
2.23-0ubuntu4
2.23-0ubuntu5
2.23-0ubuntu6
2.23-0ubuntu7
2.23-0ubuntu9
2.23-0ubuntu10
2.23-0ubuntu11
2.23-0ubuntu11.2
2.23-0ubuntu11.3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "glibc-doc",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "glibc-source",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-armel-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-dbg",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-s390-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-udeb",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-udeb-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        },
        {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.23-0ubuntu11.3+esm1"
        }
    ]
}

Ubuntu:18.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.27-3ubuntu1.5?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.27-3ubuntu1.5

Affected versions

2.*

2.26-0ubuntu2
2.26-0ubuntu2.1
2.27-0ubuntu2
2.27-0ubuntu3
2.27-3ubuntu1
2.27-3ubuntu1.2
2.27-3ubuntu1.3
2.27-3ubuntu1.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "glibc-doc",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "glibc-source",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-armel-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dbg",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-lse",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-s390-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-udeb",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.27-3ubuntu1.5"
        },
        {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.27-3ubuntu1.5"
        }
    ]
}

Ubuntu:20.04:LTS / glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc@2.31-0ubuntu9.7?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.31-0ubuntu9.7

Affected versions

2.*

2.30-0ubuntu2
2.30-0ubuntu3
2.31-0ubuntu5
2.31-0ubuntu6
2.31-0ubuntu7
2.31-0ubuntu9
2.31-0ubuntu9.1
2.31-0ubuntu9.2
2.31-0ubuntu9.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "glibc-doc",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "glibc-source",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc-bin-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc-dev-bin-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-amd64-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-armel-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dbg",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-i386-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-lse",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-prof",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-s390-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-udeb",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "libc6-x32-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.31-0ubuntu9.7"
        },
        {
            "binary_name": "nscd-dbgsym",
            "binary_version": "2.31-0ubuntu9.7"
        }
    ]
}