GNU C Library up to 2.17 setjmp/longjmp PTR_MANGLE/PTR_DEMANGLE input validation

CVSS Meta Temp Score
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CTI Interest Score
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9.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in GNU C Library up to 2.17. This vulnerability affects the function setjmp/longjmp. Executing a manipulation of the argument PTR_MANGLE/PTR_DEMANGLE can lead to input validation. This vulnerability is tracked as CVE-2013-4788. Moreover, an exploit is present. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability has been found in GNU C Library up to 2.17 (Software Library) and classified as critical. This vulnerability affects the function setjmp/longjmp. The manipulation of the argument PTR_MANGLE/PTR_DEMANGLE with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 03/01/2013. The weakness was disclosed 07/16/2013 by Hector Marco as not defined advisory (Website). The advisory is available at hmarco.org. The vendor was not involved in the coordination of the public release. This vulnerability was named CVE-2013-4788 since 07/10/2013. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

A public exploit has been developed by Hector Marco and been published before and not just after the advisory. It is possible to download the exploit at hmarco.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 136 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 70158 (Fedora 20 : glibc-2.18-9.fc20 (2013-17423)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167156 (SUSE Enterprise Linux Security Update for glibc (SUSE-SU-2014:1122-1)).

Applying the patch ptr_mangle-eglibc-2.17.patch is able to eliminate this problem. The bugfix is ready for download at hmarco.org. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (85800), Exploit-DB (28657), Tenable (70158), SecurityFocus (BID 61183†) and OSVDB (95392†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Hector Marco
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 70158
Nessus Name: Fedora 20 : glibc-2.18-9.fc20 (2013-17423)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 866945
OpenVAS Name: Fedora Update for glibc FEDORA-2013-17475
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: ptr_mangle-eglibc-2.17.patch

Timelineinfo

03/01/2013 🔍
07/10/2013 +131 days 🔍
07/15/2013 +5 days 🔍
07/15/2013 +0 days 🔍
07/16/2013 +1 days 🔍
07/16/2013 +0 days 🔍
07/19/2013 +3 days 🔍
10/02/2013 +75 days 🔍
10/04/2013 +2 days 🔍
11/29/2024 +4074 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: hmarco.org
Researcher: Hector Marco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-4788 (🔍)
GCVE (CVE): GCVE-0-2013-4788
GCVE (VulDB): GCVE-100-9562

OVAL: 🔍

X-Force: 85800
SecurityFocus: 61183
OSVDB: 95392
Vulnerability Center: 41742 - GNU GlibC 2.18 and Earlier Remote Code Execution Vulnerability due to Buffer Overflow in PTR_MANGLE, High

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/19/2013 11:47
Updated: 11/29/2024 12:46
Changes: 07/19/2013 11:47 (56), 05/12/2017 11:08 (28), 05/18/2021 23:17 (3), 11/29/2024 12:46 (21)
Complete: 🔍
Committer:
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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