Arch Linux update for openssl

Published: 2019-06-12 10:29:35
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-1543
CVSSv3 3.2 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CWE ID CWE-327
Exploitation vector Network
Public exploit N/A
Vulnerable software Arch Linux
Vulnerable software versions Arch Linux -
Vendor URL Arch Linux

Security Advisory

1) Use of a broken or risky cryptographic algorithm

Description

The vulnerability allows a remote attacker to gain access to encrypted data.

The vulnerability exists due to incorrect implementation of the ChaCha20-Poly1305 cipher. For messages, encrypted with this cipher, a reused nonce value is used that is susceptible to serious confidentiality and integrity attacks. If an application changes the default nonce length to be longer than 12 bytes and then makes a change to the leading bytes of the nonce expecting the new value to be a new unique nonce then such an application could inadvertently encrypt messages with a reused nonce.

This vulnerability does not affect internal usage of the cipher within OpenSSL. However if an application uses this cipher directly and sets a non-default nonce length to be longer than 12 bytes, it may be vulnerable.

Remediation

Update the affected package openssl to version 1.1.1.c-1.

External links

https://security.archlinux.org/advisory/ASA-201906-7

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