Opened 8 years ago

#12989 new defect

two potential buffer overflows in zephyr

Reported by: underground-stockholm Owned by: seanegan
Milestone: Component: Zephyr
Version: 2.7.7 Keywords: crash buffer-overflow
Cc:

Description

Hello,

I think I have found two potential buffer overflows in pidgin, where it will write outside of allocated memory in certain cases.

Function zephyr_login() in libpurple/protocols/zephyr/zephyr.c (from Monotone):
tempstr = g_malloc0(20000);
gchar* username = g_malloc0(100);

In both cases, there are no checks that the data copied will fit in tempstr and username.

I have no idea if this is exploitable for code execution or just a crash.

-- Frank | Underground Stockholm

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