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AUSCERT External Security Bulletin Redistribution
USN-4338-2: re2c vulnerability
29 April 2020
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
CVE Names: CVE-2020-11958
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USN-4338-2: re2c vulnerability
28 April 2020
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 20.04 LTS
re2c could be made to execute arbitrary code if it received a specially crafted
o re2c - tool for generating fast C-based recognizers
USN-4338-1 fixed vulnerabilities in re2c. This update provides the
corresponding update for Ubuntu 20.04 LTS.
Original advisory details:
Agostino Sarubbo discovered that re2c incorrectly handled certain files. An
attacker could possibly use this issue to execute arbitrary code.
The problem can be corrected by updating your system to the following package
Ubuntu 20.04 LTS
re2c - 1.3-1ubuntu0.1
To update your system, please follow these instructions: https://
In general, a standard system update will make all the necessary changes.
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