Bug 17145 - syslog with LOG_CONS leaks console file descriptor
Summary: syslog with LOG_CONS leaks console file descriptor
Status: RESOLVED FIXED
Alias: None
Product: glibc
Classification: Unclassified
Component: libc (show other bugs)
Version: unspecified
: P2 normal
Target Milestone: 2.34
Assignee: Adhemerval Zanella
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-07-12 01:36 UTC by Rich Felker
Modified: 2021-04-15 14:59 UTC (History)
3 users (show)

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Last reconfirmed:
fweimer: security?

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Description Rich Felker 2014-07-12 01:36:21 UTC 
When LOG_CONS is enabled and sending to the logging facility fails, syslog() opens /dev/console without the O_CLOEXEC flag. Thus a file descriptor to the console can leak to child processes in multithreaded programs or programs which fork and exec from signal handlers.
Comment 1 Adhemerval Zanella 2021-04-15 14:59:39 UTC 
Fixed on 2.34.