Gentoo Archives: gentoo-user

From: Andrew Savchenko <bircoph@g.o>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Ghost cyber threat
Date: Fri, 30 Jan 2015 02:34:23
Message-Id: 20150130053409.394ea5924e0b4d4484781991@gentoo.org
In Reply to: Re: [gentoo-user] Ghost cyber threat by Grant
1 On Thu, 29 Jan 2015 16:53:43 -0800 Grant wrote:
2 > glsa-check is working fine, it was a slotted issue. Still curious
3 > about a way to check for statically linked packages.
4
5 There is no simple solution for this... USE flags static and
6 static-libs handle cases where there is a choice between static and
7 non-static version. In theory it is possible that some package
8 (like boot loader helper) can be linked only statically, thus you
9 will not be able to find it by USE flag. Though probability of this
10 is very low, and due to a special nature of such binaries (or
11 libraries) attack surface is even less.
12
13 So you may assume your system reasonable secure if:
14 - all GLSAs are applied;
15 - there are no preserved libraries left (all packages using
16 vulnerable libs must be rebuilt);
17 - all static binaries and libraries depending directly or
18 indirectly on vulnerable packages are rebuild;
19 - there are no running processes using deleted files (reboot is a
20 brute, but effective way to do this, otherwise one should grep lsof
21 -n output for "(deleted)" files in use).
22 - kernel should be updated to the latest version in branch if it is
23 still supported, or upgrade to another branch, preferably LTS, if
24 it is EOLed already.
25
26 I have not seen GLSAs for kernel in ages, though old kernels
27 definitely have serious security issues, and they may be far more
28 serious than Ghost glibc bug.
29
30 Best regards,
31 Andrew Savchenko

Replies

Subject Author
Re: [gentoo-user] Ghost cyber threat Grant <emailgrant@×××××.com>