UBUNTU-CVE-2021-3711

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Source
https://ubuntu.com/security/notices/UBUNTU-CVE-2021-3711
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3711.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-3711
Related
Published
2021-08-24T00:00:00Z
Modified
2021-08-24T00:00:00Z
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

In order to decrypt SM2 encrypted data an application is expected to call the API function EVPPKEYdecrypt(). Typically an application will call this function twice. The first time, on entry, the "out" parameter can be NULL and, on exit, the "outlen" parameter is populated with the buffer size required to hold the decrypted plaintext. The application can then allocate a sufficiently sized buffer and call EVPPKEYdecrypt() again, but this time passing a non-NULL value for the "out" parameter. A bug in the implementation of the SM2 decryption code means that the calculation of the buffer size required to hold the plaintext returned by the first call to EVPPKEYdecrypt() can be smaller than the actual size required by the second call. This can lead to a buffer overflow when EVPPKEYdecrypt() is called by the application a second time with a buffer that is too small. A malicious attacker who is able present SM2 content for decryption to an application could cause attacker chosen data to overflow the buffer by up to a maximum of 62 bytes altering the contents of other data held after the buffer, possibly changing application behaviour or causing the application to crash. The location of the buffer is application dependent but is typically heap allocated. Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k).

References

Affected packages

Ubuntu:18.04:LTS / openssl

Package

Name
openssl
Purl
pkg:deb/ubuntu/openssl@1.1.1-1ubuntu2.1~18.04.13?arch=src?distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.1.1-1ubuntu2.1~18.04.13

Affected versions

1.*

1.0.2g-1ubuntu13
1.0.2g-1ubuntu14
1.0.2n-1ubuntu1
1.1.0g-2ubuntu1
1.1.0g-2ubuntu2
1.1.0g-2ubuntu3
1.1.0g-2ubuntu4
1.1.0g-2ubuntu4.1
1.1.0g-2ubuntu4.3
1.1.1-1ubuntu2.1~18.04.1
1.1.1-1ubuntu2.1~18.04.2
1.1.1-1ubuntu2.1~18.04.3
1.1.1-1ubuntu2.1~18.04.4
1.1.1-1ubuntu2.1~18.04.5
1.1.1-1ubuntu2.1~18.04.6
1.1.1-1ubuntu2.1~18.04.7
1.1.1-1ubuntu2.1~18.04.8
1.1.1-1ubuntu2.1~18.04.9
1.1.1-1ubuntu2.1~18.04.10

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "high",
    "binaries": [
        {
            "libssl-doc": "1.1.1-1ubuntu2.1~18.04.13",
            "libssl-dev": "1.1.1-1ubuntu2.1~18.04.13",
            "libssl1.1-dbgsym": "1.1.1-1ubuntu2.1~18.04.13",
            "libssl1.1-udeb": "1.1.1-1ubuntu2.1~18.04.13",
            "libssl1.1": "1.1.1-1ubuntu2.1~18.04.13",
            "openssl-dbgsym": "1.1.1-1ubuntu2.1~18.04.13",
            "libcrypto1.1-udeb": "1.1.1-1ubuntu2.1~18.04.13",
            "openssl": "1.1.1-1ubuntu2.1~18.04.13"
        }
    ]
}

Ubuntu:20.04:LTS / openssl

Package

Name
openssl
Purl
pkg:deb/ubuntu/openssl@1.1.1f-1ubuntu2.8?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.1.1f-1ubuntu2.8

Affected versions

1.*

1.1.1c-1ubuntu4
1.1.1d-2ubuntu3
1.1.1d-2ubuntu6
1.1.1f-1ubuntu1
1.1.1f-1ubuntu2
1.1.1f-1ubuntu2.1
1.1.1f-1ubuntu2.2
1.1.1f-1ubuntu2.3
1.1.1f-1ubuntu2.4
1.1.1f-1ubuntu2.5

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "high",
    "binaries": [
        {
            "libssl-doc": "1.1.1f-1ubuntu2.8",
            "libssl-dev": "1.1.1f-1ubuntu2.8",
            "libssl1.1-dbgsym": "1.1.1f-1ubuntu2.8",
            "libssl1.1-udeb": "1.1.1f-1ubuntu2.8",
            "libssl1.1": "1.1.1f-1ubuntu2.8",
            "openssl-dbgsym": "1.1.1f-1ubuntu2.8",
            "libcrypto1.1-udeb": "1.1.1f-1ubuntu2.8",
            "openssl": "1.1.1f-1ubuntu2.8"
        }
    ]
}

Ubuntu:22.04:LTS / openssl

Package

Name
openssl
Purl
pkg:deb/ubuntu/openssl@1.1.1l-1ubuntu1?arch=src?distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.1.1l-1ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "high",
    "binaries": [
        {
            "libssl-dev": "1.1.1l-1ubuntu1",
            "openssl-dbgsym": "1.1.1l-1ubuntu1",
            "libssl1.1": "1.1.1l-1ubuntu1",
            "libssl1.1-dbgsym": "1.1.1l-1ubuntu1",
            "openssl": "1.1.1l-1ubuntu1",
            "libssl-doc": "1.1.1l-1ubuntu1"
        }
    ]
}