GNU C Library (glibc) process_envvars integer overflow
| glibc-envvars-overflow (35240) |  Medium Risk |
Description:
The GNU C Library (glibc) is vulnerable to an integer overflow in the process_envvars function. By setting a large LD_HWCAP_MASK environment variable, a local attacker could exploit this vulnerability to possibly execute arbitrary code on the system.
*CVSS:
| Base Score: | 4.9 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 4 |
| Exploitability: | Unproven |
| Remediation Level: | Unavailable |
| Report Confidence: | Uncorroborated |
Consequences:
Gain Privileges
Remedy:
Apply the appropriate patch for your system. See References.
References:
- GNU C Library Web page: GNC C Library - GNU Project - Free Software Foundation (FSF).
- BID-24758: GNU GLibC LD.SO Mask Dynamic Loader Integer Overflow Vulnerability
- CVE-2007-3508: ** DISPUTED ** Integer overflow in the process_envvars function in elf/rtld.c in glibc before 2.5-rc4 might allow local users to execute arbitrary code via a large LD_HWCAP_MASK environment variable value. NOTE: the glibc maintainers state that they do not believe that this issue is exploitable for code execution.
- GLSA-200707-04: GNU C Library: Integer overflow
- SECTRACK ID: 1018334: Glibc LD_HWCAP_MASK Integer Overflow Lets Local Users Execute Arbitrary Code
- VUPEN/ADV-2007-2418: GNU C Library (glibc) process_envvars() Function Local Integer Overflow Vulnerability
Platforms Affected:
- Gentoo glibc 2.5 R3
- Gentoo Linux
Reported:
Jul 03, 2007
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.