CVE-2018-1000001

HIGH

Description

In glibc 2.26 and earlier there is confusion in the usage of getcwd() by realpath() which can be used to write before the destination buffer leading to a buffer underflow and potential code execution.

References

http://seclists.org/oss-sec/2018/q1/38

http://www.securityfocus.com/bid/102525

http://www.securitytracker.com/id/1040162

https://access.redhat.com/errata/RHSA-2018:0805

https://security.netapp.com/advisory/ntap-20190404-0003/

https://usn.ubuntu.com/3534-1/

https://usn.ubuntu.com/3536-1/

https://www.exploit-db.com/exploits/43775/

https://www.exploit-db.com/exploits/44889/

https://www.halfdog.net/Security/2017/LibcRealpathBufferUnderflow/

Details

Source: MITRE

Published: 2018-01-31

Updated: 2019-10-03

Type: CWE-787

Risk Information

CVSS v2.0

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3.0

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH