SB2017053016 - Fedora 26 update for yara

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2016-10210)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via a crafted rule that is mishandled in the yy_get_next_buffer function.

2) Use-after-free (CVE-ID: CVE-2016-10211)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing a crafted rule that is mishandled in the yr_parser_lookup_loop_variable function. A remote attackers can cause a denial of service (use-after-free and application crash).

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

3) Out-of-bounds read (CVE-ID: CVE-2017-5923)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (heap-based out-of-bounds read and application crash) via a crafted rule that is mishandled in the yara_yyparse function.

4) Use-after-free (CVE-ID: CVE-2017-5924)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing a crafted rule that is mishandled in the yr_compiler_destroy function. A remote attackers can cause a denial of service (use-after-free and application crash).

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

5) Use-after-free (CVE-ID: CVE-2017-8929)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing a crafted rule. A remote attackers can cause a denial of service (use-after-free and application crash).

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2017-cd57608211