MGASA-2021-0301 - Updated nginx package fixes a security vulnerability

Publication date: 29 Jun 2021
URL: https://advisories.mageia.org/MGASA-2021-0301.html
Type: security
Affected Mageia releases: 7, 8
CVE: CVE-2021-23017

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:
- 8/core/nginx-1.18.0-5.1.mga8
- 7/core/nginx-1.16.1-1.3.mga7

Mageia 2021-0301: nginx security update

A flaw was found in nginx

Summary

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

Resolution

MGASA-2021-0301 - Updated nginx package fixes a security vulnerability

SRPMS

- 8/core/nginx-1.18.0-5.1.mga8

- 7/core/nginx-1.16.1-1.3.mga7

Severity
Publication date: 29 Jun 2021
URL: https://advisories.mageia.org/MGASA-2021-0301.html
Type: security
CVE: CVE-2021-23017

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