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[security] Do not store username/password in extended attributes when enabling --xattr flag #3423

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sidhpurwala-huzaifa opened this issue Jan 2, 2019 · 3 comments
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@sidhpurwala-huzaifa
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@sidhpurwala-huzaifa sidhpurwala-huzaifa commented Jan 2, 2019

https://nvd.nist.gov/vuln/detail/CVE-2018-20483 contains the relevant information, can be reproduced by:

[huzaifas@babylon test]$ curl http://user1:redhat@localhost -o file --xattr
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0

[huzaifas@babylon test]$ getfattr curl
getfattr: curl: No such file or directory
[huzaifas@babylon test]$ getfattr file
# file: file
user.mime_type
user.xdg.origin.url

[huzaifas@babylon test]$ getfattr -n user.xdg.origin.url file
# file: file
user.xdg.origin.url="http://user1:redhat@localhost/"
@bagder
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@bagder bagder commented Jan 2, 2019

This is a security issue for wget because they didn't require a flag for this action like curl does. I agree we should strip off the credentials when storing the url but the security impact of the current behavior is not like the wget CVE.

@danielgustafsson
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@danielgustafsson danielgustafsson commented Jan 2, 2019

@bagder
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@bagder bagder commented Jan 3, 2019

I had some time over on a flight yesterday so there's a PR coming from me for this...

@bagder bagder added the cmdline tool label Jan 3, 2019
bagder added a commit that referenced this issue Jan 3, 2019
Both user and password are cleared uncondtitionally.

Fixes #3423
bagder added a commit that referenced this issue Jan 5, 2019
Both user and password are cleared uncondtitionally.

Fixes #3423
@bagder bagder closed this in 98e6629 Jan 10, 2019
@lock lock bot locked as resolved and limited conversation to collaborators Apr 10, 2019
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