Servers and applications
CVE-2013-4788
The PTR_MANGLE implementation in the GNU C Library (aka glibc or libc6) 2.4, 2.17, and earlier, and Embedded GLIBC (EGLIBC) does not initialize the random value for the pointer guard, which makes it easier for context-dependent attackers to control execution flow by leveraging a buffer-overflow vulnerability in an application and using the known zero value pointer guard to calculate a pointer…
- Severity
- Medium 5.1
- Published
- 4 Oct 2013
- Last changed
- 16 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Exploit chance
- 11% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 12 Nov 2026
- Attack
- Over the network · Only under certain conditions · No login needed
- Attacker can
- Read some data · Change some data · Slow it down
- CVSS vector
AV:N/AC:H/Au:N/C:P/I:P/A:P- Sources
- NVD
Description
The PTR_MANGLE implementation in the GNU C Library (aka glibc or libc6) 2.4, 2.17, and earlier, and Embedded GLIBC (EGLIBC) does not initialize the random value for the pointer guard, which makes it easier for context-dependent attackers to control execution flow by leveraging a buffer-overflow vulnerability in an application and using the known zero value pointer guard to calculate a pointer address.
Affected software
| Software | Affected versions |
|---|---|
GNU C LibraryServers and applications · cpe:a:gnu:glibc |
All 27 release lines
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