Integer overflow in the valid_user_field function in journal/journald-native.c in systemd allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a large journal data field, which triggers a heap-based buffer overflow.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=859051 | issue tracking third party advisory patch |
| https://security.gentoo.org/glsa/201612-34 | third party advisory vendor advisory |
| http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=725357 | issue tracking mailing list patch third party advisory |
| http://www.debian.org/security/2013/dsa-2777 | third party advisory vendor advisory |
| http://www.openwall.com/lists/oss-security/2013/10/01/9 | third party advisory mailing list |
| http://cgit.freedesktop.org/systemd/systemd/commit/?id=505b6a61c22d5565e9308045c7b9bf79f7d0517e | exploit patch vendor advisory |