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Groups > linux.kernel > #1648746
| From | Ken Goldman <kgold@linux.vnet.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [Linux-ima-devel] [PATCH 0/7] IMA: new parser for ima_restore_measurement_list() |
| Date | 2017-05-23 23:20 +0200 |
| Message-ID | <tKpnJ-w5-57@gated-at.bofh.it> (permalink) |
| References | <tHKf0-5Iw-7@gated-at.bofh.it> <tHQ14-157-19@gated-at.bofh.it> <tI1zb-8vR-7@gated-at.bofh.it> <tI9ZL-5oT-11@gated-at.bofh.it> <tIq4x-8sq-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 5/18/2017 5:38 AM, Roberto Sassu wrote:
>
> There cannot be buffer overflow, because the length of each digest
> field is known.
Crypto Agile: pcr[4] total_digest_len[4]
digest1_len[4] digest1[digest1_len] ...
The way I read this, the digest length is supplied by the caller, which
is slightly different from "known". For example, if I supply a digest
length of 0xffffffff, a too trusting (buggy) parser could overflow the
buffer.
total_digest_len is similarly untrusted. The attacker can send invalid
values.
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[PATCH 0/7] IMA: new parser for ima_restore_measurement_list() Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-16 15:00 +0200
[PATCH 4/7] ima: declare get_binary_runtime_size() as non-static Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-16 15:00 +0200
[PATCH 1/7] ima: introduce ima_parse_buf() Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-16 15:00 +0200
[PATCH 7/7] ima: fix get_binary_runtime_size() Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-16 15:00 +0200
[PATCH 6/7] ima: add securityfs interface to restore a measurements list Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-16 15:00 +0200
[PATCH 5/7] ima: add securityfs interface to save a measurements list with kexec header Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-16 15:00 +0200
Re: [Linux-ima-devel] [PATCH 0/7] IMA: new parser for ima_restore_measurement_list() Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-05-16 21:10 +0200
Re: [Linux-ima-devel] [PATCH 0/7] IMA: new parser for ima_restore_measurement_list() Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-17 09:30 +0200
Re: [Linux-ima-devel] [PATCH 0/7] IMA: new parser for ima_restore_measurement_list() Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-05-17 18:30 +0200
Re: [Linux-ima-devel] [PATCH 0/7] IMA: new parser for ima_restore_measurement_list() Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-18 11:40 +0200
Re: [Linux-ima-devel] [PATCH 0/7] IMA: new parser for ima_restore_measurement_list() Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-05-23 22:50 +0200
Re: [Linux-ima-devel] [PATCH 0/7] IMA: new parser for ima_restore_measurement_list() Roberto Sassu <roberto.sassu@huawei.com> - 2017-05-24 10:30 +0200
Re: [Linux-ima-devel] [PATCH 0/7] IMA: new parser for ima_restore_measurement_list() Ken Goldman <kgold@linux.vnet.ibm.com> - 2017-05-23 23:20 +0200
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