Gentoo update for Patch



| Updated: 2019-08-25
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-13636
CVE-2019-13638
CWE-ID CWE-59
CWE-78
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Gentoo Linux
Operating systems & Components / Operating system

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Link Resolution Before File Access ('Link Following')

EUVDB-ID: #VU19283

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-13636

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Exploit availability: No

Description

The vulnerability allows a local user to gain unauthorized access to files or directories on a targeted system.

The vulnerability exists due to the software mishandles the following of symlinks in certain cases other than input files in the "inp.c" and "util.c" files. A local authenticated user can gain unauthorized access to read or modify files and directories on a targeted system.

Mitigation

Update the affected packages.
sys-devel/patch to version: 2.7.6-r4

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/
https://security.gentoo.org/glsa/201908-22


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.

2) OS Command Injection

EUVDB-ID: #VU19504

Risk: Low

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-13638

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of ed style diff payload with shell metacharacters in patch files. A remote attacker can trick the victim to use a specially crafted patch file and execute arbitrary OS commands.

Mitigation

Update the affected packages.
sys-devel/patch to version: 2.7.6-r4

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/
https://security.gentoo.org/glsa/201908-22


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.



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