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Files from Mohin Paramasivam

First Active2019-10-15
Last Active2019-11-29
Bash 5.0 Patch 11 Privilege Escalation
Posted Nov 29, 2019
Authored by Mohin Paramasivam, Chet Ramey, Ian Pudney

An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected.

tags | exploit, shell, bash
systems | linux
advisories | CVE-2019-18276
MD5 | 839a835373eff1043e2c6d5d697405eb
sudo 1.8.28 Security Bypass
Posted Oct 15, 2019
Authored by joev, Mohin Paramasivam

sudo version 1.8.28 suffers from a security bypass vulnerability.

tags | exploit, bypass
MD5 | 6156d8a204112f3740a39ba32ccb9066
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