Ubuntu 4954-1: GNU C Library vulnerabilities | LinuxSecurity.com

Advisories

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Ubuntu Security Notice USN-4954-1
May 14, 2021

glibc vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in GNU C Library.

Software Description:
- glibc: GNU C Library

Details:

Jason Royes and Samuel Dytrych discovered that the memcpy()
implementation for 32 bit ARM processors in the GNU C Library contained
an integer underflow vulnerability. An attacker could possibly use
this to cause a denial of service (application crash) or execute
arbitrary code. (CVE-2020-6096)

It was discovered that the POSIX regex implementation in the GNU C
Library did not properly parse alternatives. An attacker could use this
to cause a denial of service. (CVE-2009-5155)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
  libc6                           2.23-0ubuntu11.3

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-4954-1
  CVE-2009-5155, CVE-2020-6096

Ubuntu 4954-1: GNU C Library vulnerabilities

May 13, 2021

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: Several security issues were fixed in GNU C Library. Software Description: - glibc: GNU C Library Details: Jason Royes and Samuel Dytrych discovered that the memcpy() implementation for 32 bit ARM processors in the GNU C Library contained an integer underflow vulnerability. An attacker could possibly use this to cause a denial of service (application crash) or execute arbitrary code. (CVE-2020-6096) It was discovered that the POSIX regex implementation in the GNU C Library did not properly parse alternatives. An attacker could use this to cause a denial of service. (CVE-2009-5155)

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: libc6 2.23-0ubuntu11.3 After a standard system update you need to reboot your computer to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4954-1

CVE-2009-5155, CVE-2020-6096

Severity
Ubuntu Security Notice USN-4954-1

Package Information

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