#VU110118 Input validation error in Glibc - CVE-2013-4788
Published: July 1, 2017 / Updated: June 3, 2025
Vulnerability identifier: #VU110118
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2013-4788
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Glibc
Glibc
Software vendor:
GNU
GNU
Description
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
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. Additional information that was taken into consideration while scoring: https://bugzilla.redhat.com/show_bug.cgi?id=985625
Remediation
Install update from vendor's website.
External links
- http://hmarco.org/bugs/CVE-2013-4788.html
- http://seclists.org/fulldisclosure/2015/Sep/23
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:283
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:284
- http://www.openwall.com/lists/oss-security/2013/07/15/9
- http://www.securityfocus.com/bid/61183
- https://security.gentoo.org/glsa/201503-04