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CVE-2018-6003

Published: 22 January 2018

An issue was discovered in the _asn1_decode_simple_ber function in decoding.c in GNU Libtasn1 before 4.13. Unlimited recursion in the BER decoder leads to stack exhaustion and DoS.

Notes

AuthorNote
leosilva 
libtasn1-3 (precise) and libtasn1-6 (trusty) are not affected
since vulnerable code was introduced in 4.3
bionic already has the fix

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
libtasn1-3
Launchpad, Ubuntu, Debian 		artful Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

libtasn1-6
Launchpad, Ubuntu, Debian 		artful
Released (4.12-2.1ubuntu0.1)
trusty Not vulnerable

upstream
Released (4.13-2)
xenial
Released (4.7-3ubuntu0.16.04.3)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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