ZDI-CAN-9867: Canonical libgsm AssertFailure

[Zero Day Initiative]

ZDI-CAN-9867: Canonical libgsm AssertFailure

-- CVSS -----------------------------------------

0.0: AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

-- ABSTRACT -------------------------------------

Trend Micro's Zero Day Initiative has identified a vulnerability affecting the following products:
Libgsm - libgsm

-- VULNERABILITY DETAILS ------------------------

Version tested: 1.0.18-2
Installer file: https://code.launchpad.net/ubuntu/+source/libgsm
Platform tested: Ubuntu
Analysis
Please see attached documentation for full vulnerability details.

gsm: src/add.c:220: word gsm_div(word, word): Assertion `num >= 0 && denum >= num' failed.

-- CREDIT ---------------------------------------
This vulnerability was discovered by:
Lacne Jiang of Trend Micro

-- FURTHER DETAILS ------------------------------

If supporting files were contained with this report they are provided within a password protected ZIP file. The password is the ZDI candidate number in the form: ZDI-CAN-XXXX where XXXX is the ID number.

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Zero Day Initiative
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-- INFORMATION ABOUT THE ZDI --------------------
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-- DISCLOSURE POLICY ----------------------------

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[Alex Murray (alexmurray)]

Has this been reported to the upstream libgsm developers?

[Alex Murray (alexmurray)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. Since the package referred to in this bug is in universe or multiverse, it is community maintained. If you are able, I suggest coordinating with upstream and posting a debdiff for this issue. When a debdiff is available, members of the security team will review it and publish the package. See the following link for more information: https://wiki.ubuntu.com/SecurityTeam/UpdateProcedures