UBUNTU-CVE-2021-22901

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Source
https://ubuntu.com/security/CVE-2021-22901
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-22901.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-22901
Related
Published
2021-05-26T06:00:00Z
Modified
2021-05-26T06:00:00Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.

References

Affected packages

Ubuntu:18.04:LTS / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl?arch=src?distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.58.0-2ubuntu3.13

Affected versions

7.*

7.55.1-1ubuntu2
7.55.1-1ubuntu2.1
7.57.0-1ubuntu1
7.58.0-2ubuntu1
7.58.0-2ubuntu2
7.58.0-2ubuntu3
7.58.0-2ubuntu3.1
7.58.0-2ubuntu3.2
7.58.0-2ubuntu3.3
7.58.0-2ubuntu3.5
7.58.0-2ubuntu3.6
7.58.0-2ubuntu3.7
7.58.0-2ubuntu3.8
7.58.0-2ubuntu3.9
7.58.0-2ubuntu3.10
7.58.0-2ubuntu3.12

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "curl"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "curl-dbgsym"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl3-gnutls"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl3-gnutls-dbgsym"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl3-nss"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl3-nss-dbgsym"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl4"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl4-dbgsym"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl4-doc"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl4-gnutls-dev"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl4-nss-dev"
        },
        {
            "binary_version": "7.58.0-2ubuntu3.13",
            "binary_name": "libcurl4-openssl-dev"
        }
    ]
}

Ubuntu:20.04:LTS / curl

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.68.0-1ubuntu2.5

Affected versions

7.*

7.65.3-1ubuntu3
7.65.3-1ubuntu4
7.66.0-1ubuntu1
7.67.0-2ubuntu1
7.68.0-1ubuntu1
7.68.0-1ubuntu2
7.68.0-1ubuntu2.1
7.68.0-1ubuntu2.2
7.68.0-1ubuntu2.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "curl"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "curl-dbgsym"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl3-gnutls"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl3-gnutls-dbgsym"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl3-nss"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl3-nss-dbgsym"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl4"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl4-dbgsym"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl4-doc"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl4-gnutls-dev"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl4-nss-dev"
        },
        {
            "binary_version": "7.68.0-1ubuntu2.5",
            "binary_name": "libcurl4-openssl-dev"
        }
    ]
}