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Bug 1510455 - (CVE-2017-15298) CVE-2017-15298 git: Mishandling layers of tree objects
CVE-2017-15298 git: Mishandling layers of tree objects
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20171012,reported=2...
: Security
Depends On: 1510457
Blocks:
  Show dependency tree / graph
 
Reported: 2017-11-07 07:55 EST by Andrej Nemec
Modified: 2018-05-10 14:23 EDT (History)
47 users (show)

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Description Andrej Nemec 2017-11-07 07:55:30 EST 
Git through 2.14.2 mishandles layers of tree objects, which allows remote attackers to cause a denial of service (memory consumption) via a crafted repository, aka a Git bomb. This can also have an impact of disk consumption; however, an affected process typically would not survive its attempt to build the data structure in memory before writing to disk.

External References:

https://kate.io/blog/git-bomb/

References:

https://github.com/Katee/git-bomb
Comment 1 Andrej Nemec 2017-11-07 07:56:48 EST 
Created git tracking bugs for this issue:

Affects: fedora-all [bug 1510457]
Comment 2 Todd Zullinger 2017-11-07 11:48:34 EST 
git <= 2.14.3 is vulnerable here, I believe.  The upstream commit which resolves this is https://git.kernel.org/pub/scm/git/git.git/commit/?id=a937b37e76 (merged yesterday).  I imagine we'll see some maint releases from upstream shortly.  The commit applies cleanly to 2.9.x (which f25 runs).  I didn't look any further back than that.
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