SB2017032117 - Red Hat Enterprise Linux 6 update for glibc

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2014-9761)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing a long argument to the (1) nan, (2) nanf, or (3) nanl function. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Input validation error (CVE-ID: CVE-2015-8776)

The vulnerability allows a remote non-authenticated attacker to read data or crash the application.

The strftime function in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers to cause a denial of service (application crash) or possibly obtain sensitive information via an out-of-range time value.

3) Buffer overflow (CVE-ID: CVE-2015-8778)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Integer overflow in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via the size argument to the __hcreate_r function, which triggers out-of-bounds heap-memory access.

4) Stack-based buffer overflow (CVE-ID: CVE-2015-8779)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing a long catalog name. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://access.redhat.com/errata/RHSA-2017:0680