Control: fixed -1 1:4.7-1 Salvatore Bonaccorso <[email protected]> ezt írta (időpont: 2018. febr. 15., Cs, 22:33): > > Source: shadow > Version: 1:4.5-1 > Severity: important > Tags: security upstream > > Hi, > > the following vulnerability was published for shadow. > > CVE-2018-7169[0]: > | An issue was discovered in shadow 4.5. newgidmap (in shadow-utils) is > | setuid and allows an unprivileged user to be placed in a user namespace > | where setgroups(2) is permitted. This allows an attacker to remove > | themselves from a supplementary group, which may allow access to > | certain filesystem paths if the administrator has used "group > | blacklisting" (e.g., chmod g-rwx) to restrict access to paths. This > | flaw effectively reverts a security feature in the kernel (in > | particular, the /proc/self/setgroups knob) to prevent this sort of > | privilege escalation. > > If you fix the vulnerability please also make sure to include the > CVE (Common Vulnerabilities & Exposures) id in your changelog entry. > > For further information see: > > [0] https://security-tracker.debian.org/tracker/CVE-2018-7169 > https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7169 > [1] https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1729357 > > > Please adjust the affected versions in the BTS as needed. > > Regards, > Salvatore >
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