[Bug 1908995] Re: net-snmp SIGSEGV: not enough space or error in allocation for extenstion

[Graham Leggett]

This bug is a duplicate of: https://bugs.launchpad.net/ubuntu/+source
/net-snmp/+bug/1912389

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https://bugs.launchpad.net/bugs/1908995

Title:
  net-snmp SIGSEGV: not enough space or error in allocation for
  extenstion

Status in logilab-common package in Ubuntu:
  New

Bug description:
  When a certificate contains an extension that when printed becomes
  longer than 512 bytes (for example certificate transparency as used in
  modern certs) net-snmp crashes on startup with a SIGSEGV.

  The following patches fix the problem by:

  - Increasing the buffer size from 512 to 4096 bytes when dumping cert
  extensions.

  - Checking for NULL before attempting a strchr, fixing the crash.

  Bug report with fix at https://github.com/net-snmp/net-
  snmp/issues/233.

  Individual patches:

  https://github.com/net-snmp/net-snmp/commit/9d001c34196df47526260441af35a509a325e41f.diff
  https://github.com/net-snmp/net-snmp/commit/4c5d2ceae4d4a8b77db48fc8fff77e14943ff4d3.diff
  https://github.com/net-snmp/net-snmp/commit/bb30f8ee0075750fd3648a6bf3fab543f46152ed.diff
  https://github.com/net-snmp/net-snmp/commit/969226ea501b92e1a2ed427bc1a46f18ef2890b7.diff

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