Fedora EPEL 6 update for yara
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2017-9304 CVE-2017-9465 CVE-2017-9438 CVE-2017-8929 |
| CWE-ID | CWE-674 CWE-125 CWE-416 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Fedora Operating systems & Components / Operating system yara Operating systems & Components / Operating system package or component |
| Vendor | Fedoraproject |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Uncontrolled Recursion
EUVDB-ID: #VU38930
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-9304
CWE-ID:
CWE-674 - Uncontrolled Recursion
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
libyara/re.c in the regexp module in YARA 3.5.0 allows remote attackers to cause a denial of service (stack consumption) via a crafted rule that is mishandled in the _yr_re_emit function.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 6.0
yara: before 3.6.2-1.el6
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2017-58b5b1f166
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Out-of-bounds read
EUVDB-ID: #VU38890
Risk: Medium
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-9465
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in The yr_arena_write_data function in YARA 3.6.1. A remote attacker can perform a denial of service (buffer over-read and application crash) or obtain sensitive information from process memory via a crafted file that is mishandled in the yr_re_fast_exec function in libyara/re.c and the _yr_scan_match_callback function in libyara/scan.c.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 6.0
yara: before 3.6.2-1.el6
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2017-58b5b1f166
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Uncontrolled Recursion
EUVDB-ID: #VU38920
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-9438
CWE-ID:
CWE-674 - Uncontrolled Recursion
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
libyara/re.c in the regexp module in YARA 3.5.0 allows remote attackers to cause a denial of service (stack consumption) via a crafted rule (involving hex strings) that is mishandled in the _yr_re_emit function, a different vulnerability than CVE-2017-9304.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 6.0
yara: before 3.6.2-1.el6
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2017-58b5b1f166
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Use-after-free
EUVDB-ID: #VU38995
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-8929
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 6.0
yara: before 3.6.2-1.el6
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2017-58b5b1f166
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
