oss-sec mailing list archives
Re: CVE-Request taglib vulnerabilities
From: Zubin Mithra <zubin.mithra () gmail com>
Date: Wed, 21 Mar 2012 23:49:32 +0530
On Wed, Mar 21, 2012 at 10:49 PM, Kurt Seifried <kseifried () redhat com>wrote:
On 03/21/2012 09:42 AM, Ludwig Nussel wrote:Zubin Mithra wrote:[...] The issues which are present in the latest "release" but not in thecurrentdevelopment head were :- [3] Lack of sanity checks of fields which were read, and were used for allocating memory; crafted files would lead of application crash.Not an issue according to upstream: http://mail.kde.org/pipermail/taglib-devel/2012-March/002187.htmlShouldn't it simply say "file to large" or "unable to allocate blah" something rather than crashing? I assume by "large" file the file doesn't actually need to be large, just the header information needs to claim it is large?
Yes, the file does not need to be large, it just needs to have a crafted header. On investigating the issue further, discussing with a developer Lukas Laninsky and providing PoC's, we had confirmed that the root issue was an Integer overflow - which would cause a large allocation and crash the application. The changeset that corrects it can be found here => https://github.com/taglib/taglib/commit/dcdf4fd954e3213c355746fa15b7480461972308
[4] A one bit change in a working ogg file would cause a thread to loop infinitely.http://mail.kde.org/pipermail/taglib-devel/2012-March/002191.htmlhttps://github.com/taglib/taglib/commit/b3646a07348ffa276ea41a9dae03ddc63ea6c532 Has this been confirmed? Does the looping thread actually cause a DoS, simply slow down the application a bit, or?
Yes, it just causes a thread to cause an infinite loop and does not cause an application crash.
cu Ludwig-- Kurt Seifried Red Hat Security Response Team (SRT)
Regards, Zubin Mithra
Current thread:
- CVE-Request taglib vulnerabilities Zubin Mithra (Mar 04)
- Re: CVE-Request taglib vulnerabilities Kurt Seifried (Mar 04)
- Re: CVE-Request taglib vulnerabilities Zubin Mithra (Mar 04)
- Re: CVE-Request taglib vulnerabilities Kurt Seifried (Mar 05)
- Re: CVE-Request taglib vulnerabilities Ludwig Nussel (Mar 21)
- Re: CVE-Request taglib vulnerabilities Kurt Seifried (Mar 21)
- Re: CVE-Request taglib vulnerabilities Zubin Mithra (Mar 21)
- Re: CVE-Request taglib vulnerabilities Ludwig Nussel (Mar 26)
- Re: CVE-Request taglib vulnerabilities Kurt Seifried (Mar 26)
- Re: CVE-Request taglib vulnerabilities Zubin Mithra (Mar 04)
- Re: CVE-Request taglib vulnerabilities Kurt Seifried (Mar 04)