Date: Thu, 18 Mar 2021 07:04:00 +0100 From: Salvatore Bonaccorso <carnil@...ian.org> To: oss-security@...ts.openwall.com Subject: Re: CVE-2020-35519 Linux kernel: x25_bind out-of-bounds read Hi, On Wed, Mar 17, 2021 at 05:14:57PM -0400, Sasha Levin wrote: > On Thu, Mar 18, 2021 at 01:20:18AM +0530, Rohit Keshri wrote: > > Hello Team, > > > > An out-of-bounds (OOB) memory access flaw was found in x25_bind in > > net/x25/af_x25.c in the Linux kernel. A bounds check failure allows a local > > attacker with a user account on the system to gain access to out-of-bounds > > memory, leading to a system crash or a leak of internal kernel information. > > The highest threat from this vulnerability is to confidentiality, > > integrity, as well as system availability. > > > > 'CVE-2020-35519' was assigned by Red Hat. > > This mail doesn't even mention where/how this is fixed. Is this > 6ee50c8e262a ("net/x25: prevent a couple of overflows")? > > If so, it's already fixed in all stable kernels. > > How can the issue cause a leak btw? Just as additional reference: I think this goes back to this report: https://www.openwall.com/lists/oss-security/2020/11/15/2 In upstream this was fixed then if the above is correct in v4.4.248 v4.9.248 v4.14.211 v4.19.162 v5.4.82 v5.9.13 v5.10-rc7 Regards, Salvatore
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