oss-sec mailing list archives
more bash parser bugs (CVE-2014-6277, CVE-2014-6278)
From: Hanno Böck <hanno () hboeck de>
Date: Wed, 1 Oct 2014 20:20:17 +0200
Haven't seen it here yet. lcamtuf now disclosed details of the two further parser bugs he found: http://lcamtuf.blogspot.de/2014/10/bash-bug-how-we-finally-cracked.html Basically if anyone hasn't applied one of the prefix patches yet now's the time to do so. While prefixing should shield against them they should still be fixed for good. CVE-2014-6277 can still be triggered to segfault a fully patched bash: bash -c "f(){ x(){ _;}; x(){ _;}<<a;}" Second issue PoC on fully patched system: env BASH_FUNC_x%%='() { _;}>_[$($())] { echo vuln;}' bash -c : (both likely not exploitable due to prefix shielding, but should be fixed anyway) -- Hanno Böck http://hboeck.de/ mail/jabber: hanno () hboeck de GPG: BBB51E42
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Current thread:
- more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Hanno Böck (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Chet Ramey (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Shawn (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Chet Ramey (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Shawn (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Ed Prevost (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Zach Wikholm (Oct 01)
- RE: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Henry, Bobby (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Chet Ramey (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Ed Prevost (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Shawn (Oct 01)
- Re: more bash parser bugs (CVE-2014-6277, CVE-2014-6278) Chet Ramey (Oct 01)