An ARM mbed TLS security update has been released for Ubuntu Linux 16.04 LTS.
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Ubuntu Security Notice USN-4267-1
February 05, 2020
mbedtls vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in mbedtls.
Software Description:
- mbedtls: lightweight crypto and SSL/TLS library - crypto library
Details:
It was discovered that mbedtls has a bounds-check bypass through an integer
overflow that can be used by an attacked to execute arbitrary code or cause a
denial of service.
(CVE-2017-18187)
It was discovered that mbedtls has a vulnerability where an attacker could
execute arbitrary code or cause a denial of service (buffer overflow)
via a crafted certificate chain that is mishandled during RSASSA-PSS
signature verification within a TLS or DTLS session.
(CVE-2018-0487)
It was discovered that mbedtls has a vulnerability where an attacker could
execute arbitrary code or cause a denial of service (heap corruption) via a
crafted application packet within a TLS or DTLS session.
(CVE-2018-0488)
It was discovered that mbedtls has a vulnerability that allows remote
attackers to achieve partial plaintext recovery (for a CBC based ciphersuite)
via a timing-based side-channel attack.
(CVE-2018-0497)
It was discovered that mbedtls has a vulnerability that allows local users to
achieve partial plaintext recovery (for a CBC based ciphersuite) via a
cache-based side-channel attack.
(CVE-2018-0498)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
libmbedcrypto0 2.2.1-2ubuntu0.3
libmbedtls10 2.2.1-2ubuntu0.3
libmbedx509-0 2.2.1-2ubuntu0.3
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4267-1
CVE-2017-18187, CVE-2018-0487, CVE-2018-0488, CVE-2018-0497,
CVE-2018-0498
Package Information:
https://launchpad.net/ubuntu/+source/mbedtls/2.2.1-2ubuntu0.3
