Ubuntu: Security Advisory for mbedtls (USN-4267-1)

Published: 2020-02-06 04:00:18
CVE Author: NIST National Vulnerability Database (NVD)

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Summary:
The remote host is missing an update for the 'mbedtls' Linux Distribution Package(s) announced via the USN-4267-1 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical 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)

Affected Versions:
'mbedtls' Linux Distribution Package(s) on Ubuntu 16.04 LTS.

Recommendations:
Please install the updated Linux Distribution Package(s).

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2017-18187
https://nvd.nist.gov/vuln/detail/CVE-2018-0487
https://nvd.nist.gov/vuln/detail/CVE-2018-0488
https://nvd.nist.gov/vuln/detail/CVE-2018-0497
https://nvd.nist.gov/vuln/detail/CVE-2018-0498

References:

https://lists.ubuntu.com/archives/ubuntu-security-announce/2020-February/005317.html

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Severity
High
CVSS Score
7.5

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