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Vulnerability CVE-2019-18684
Published: 2019-11-04 Modified: 2019-11-05
Description: |
** DISPUTED ** Sudo through 1.8.29 allows local users to escalate to root if they have write access to file descriptor 3 of the sudo process. This occurs because of a race condition between determining a uid, and the setresuid and openat system calls. The attacker can write "ALL ALL=(ALL) NOPASSWD:ALL" to /proc/#####/fd/3 at a time when Sudo is prompting for a password. NOTE: This has been disputed due to the way Linux /proc works. It has been argued that writing to /proc/#####/fd/3 would only be viable if you had permission to write to /etc/sudoers. Even with write permission to /proc/#####/fd/3, it would not help you write to /etc/sudoers. |
Type:
CWE-362
CVSS2 => (AV:L/AC:M/Au:N/C:C/I:C/A:C)
CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
6.9/10 |
10/10 |
3.4/10 |
Exploit range |
Attack complexity |
Authentication |
Local |
Medium |
No required |
Confidentiality impact |
Integrity impact |
Availability impact |
Complete |
Complete |
Complete |
References: |
https://gist.github.com/oxagast/51171aa161074188a11d96cbef884bbd
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