gh-ARMmbed/mbed-crypto
Watch
1
0
Fork
You've already forked mbed-crypto
 0
Code Issues 36 Pull requests 1 Releases 7 Activity

Fix possible error code mangling in psa_mac_verify_finish #345

Merged
gilles-peskine-arm merged 1 commit from psa_mac_verify_finish-status into development 2020-02-03 07:55:12 -06:00
Conversation 3 Commits 1 Files changed 1 +2
gilles-peskine-arm commented 2020-01-20 09:36:42 -06:00 (Migrated from github.com)

If psa_mac_finish_internal fails (which can only happen due to bad
parameters or hardware problem), the error code was converted to
PSA_ERROR_INVALID_SIGNATURE if the uninitialized stack variable
actual_mac happened to contain the expected MAC. This is a minor bug
but it may be possible to leverage it as part of a longer attack path
in some scenarios.

Reported externally. Found by static analysis.

If psa_mac_finish_internal fails (which can only happen due to bad parameters or hardware problem), the error code was converted to PSA_ERROR_INVALID_SIGNATURE if the uninitialized stack variable actual_mac happened to contain the expected MAC. This is a minor bug but it may be possible to leverage it as part of a longer attack path in some scenarios. Reported externally. Found by static analysis.
mpg (Migrated from github.com) approved these changes 2020-01-21 04:53:47 -06:00
mpg (Migrated from github.com) left a comment

Looks good to me.

Looks good to me.
mpg commented 2020-01-21 05:09:21 -06:00 (Migrated from github.com)

Looking at CI results in the pr-merge job, the only failures are with Mbed OS testing, which is expected as Mbed OS needs updating. All other tests pass, so this is as good as a pass.

Looking at CI results in the pr-merge job, the only failures are with Mbed OS testing, which is expected as Mbed OS needs updating. All other tests pass, so this is as good as a pass.
yanesca (Migrated from github.com) approved these changes 2020-02-03 07:53:19 -06:00
Sign in to join this conversation.
Reviewers
No reviewers
mpg
yanesca
Labels
Clear labels   
api-spec
Issue or PR about the PSA specifications

  
bug
Something isn't working

  
CLA requested

   
CLA valid

   
compliance
Discrepancy between the library and the PSA Crypto API specification

  
DO NOT MERGE
The PR is not intended to be merged (yet). Usually used for a review of worked in progress.

  
duplicate
This issue or pull request already exists

  
enhancement
New feature or request

  
feature branch
This issue or PR is for a short-term feature branch which doesn't have its own label.

  
good first issue
Good for newcomers

  
HEADER FORMATTING ISSUE

   
help wanted
Extra attention is needed

  
Information

   
invalid
This doesn't seem right

  
Jira status: AWAITING REVIEW

   
Jira status: CLOSED

   
Jira status: DONE

   
Jira status: IN PROGRESS

   
Jira status: IN REVIEW

   
Jira status: OPEN

   
Jira status: REOPENED

   
Jira status: RESOLVED

   
mirrored

   
mirror internally

   
needs: backports
Needs backports to Mbed TLS branches

  
needs: ci
Needs a passing full CI run

  
needs: design review

   
needs: preceding PR
Requires another PR to be merged first

  
needs: review
The pull request is ready for review. This generally means that it has no known issues.

  
needs: work
The pull request needs rework before it can be merged.

  
notabug
The bug is not considered to be a defect, but by design.

  
open for community contribution

   
Product Backlog

   
question
Further information is requested

  
ready for merge
Design and code approved, CI passed, and likewise for backports. Label added by gatekeepers only.

  
security
Security expertise requested in review

  
stale
This PR is not being actively worked on. It can be considered abandoned work.

  
type: bug

   
type: enhancement

   
type: question

   
web pages
The /docs directory in the master branch is shown on https://armmbed.github.io/mbed-crypto

  
wontfix
The cost of fixing the bug or managing it in the bug list is not justified.

  
writing
Documentation wording and formatting

No labels
api-spec
bug
CLA requested
CLA valid
compliance
DO NOT MERGE
duplicate
enhancement
feature branch
good first issue
HEADER FORMATTING ISSUE
help wanted
Information
invalid
Jira status: AWAITING REVIEW
Jira status: CLOSED
Jira status: DONE
Jira status: IN PROGRESS
Jira status: IN REVIEW
Jira status: OPEN
Jira status: REOPENED
Jira status: RESOLVED
mirrored
mirror internally
needs: backports
needs: ci
needs: design review
needs: preceding PR
needs: review
needs: work
notabug
open for community contribution
Product Backlog
question
ready for merge
security
stale
type: bug
type: enhancement
type: question
web pages
wontfix
writing
Milestone
Clear milestone
No items
No milestone
Assignees
Clear assignees
No assignees
1 participant
Notifications
Due date
The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set

Reference
gh-ARMmbed/mbed-crypto!345
No description provided.