Advisories » MGASA-2021-0301

Updated nginx package fixes a security vulnerability

Publication date: 29 Jun 2021
Modification date: 29 Jun 2021
Type: security
Affected Mageia releases : 7 , 8
CVE: CVE-2021-23017

Description

A flaw was found in nginx. An off-by-one error while processing DNS responses
allows a network attacker to write a dot character out of bounds in a heap
allocated buffer which can allow overwriting the least significant byte of next
heap chunk metadata likely leading to a remote code execution in certain
circumstances. The highest threat from this vulnerability is to data
confidentiality and integrity as well as system availability (CVE-2021-23017).
                

References

• https://bugs.mageia.org/show_bug.cgi?id=28965
• https://www.openwall.com/lists/oss-security/2021/05/25/5
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/7SFVYHC7OXTEO4SMBWXDVK6E5IMEYMEE/
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23017

SRPMS

7/core

• nginx-1.16.1-1.3.mga7

8/core

• nginx-1.18.0-5.1.mga8