Linux Kernel 3.10.77 load_elf_binary memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

A vulnerability, which was classified as critical, was found in Linux Kernel 3.10.77 (Operating System). This affects the function load_elf_binary. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Linux distributions that have not patched their long-term kernels with https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (committed on April 14, 2015). This kernel vulnerability was fixed in April 2015 by commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (backported to Linux 3.10.77 in May 2015), but it was not recognized as a security threat. With CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE enabled, and a normal top-down address allocation strategy, load_elf_binary() will attempt to map a PIE binary into an address range immediately below mm->mmap_base. Unfortunately, load_elf_ binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are that is supposed to be the "gap" between the stack and the binary.

The bug was discovered 09/26/2017. The weakness was released 10/05/2017 (Website). The advisory is shared at securityfocus.com. This vulnerability is uniquely identified as CVE-2017-1000253 since 10/03/2017. The exploitability is told to be easy. An attack has to be approached locally. A authentication is necessary for exploitation. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 103517 (CentOS 6 : kernel (CESA-2017:2795)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350099 (Amazon Linux Security Advisory for kernel: ALAS-2015-603).

Upgrading eliminates this vulnerability. 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 Tenable (103517) and Exploit-DB (42887). Entries connected to this vulnerability are available at 74789 and 78291.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.8
VulDB Temp Score: 7.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Nessus ID: 103517
Nessus Name: CentOS 6 : kernel (CESA-2017:2795)
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 881932
OpenVAS Name: CentOS Update for kernel CESA-2017:2795 centos6
OpenVAS File: 🔍
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Qualys ID: 🔍
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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/26/2017 🔍
09/26/2017 +0 days 🔍
09/27/2017 +1 days 🔍
09/28/2017 +1 days 🔍
10/03/2017 +5 days 🔍
10/04/2017 +1 days 🔍
10/05/2017 +1 days 🔍
10/05/2017 +0 days 🔍
12/30/2022 +1912 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2017:2795⛔
Researcher: Qualys Research Labs
Status: Not defined

CVE: CVE-2017-1000253 (🔍)
SecurityTracker: 1039434
SecurityFocus: 101010

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

Entryinfo

Created: 10/05/2017 15:16
Updated: 12/30/2022 17:35
Changes: 10/05/2017 15:16 (73), 11/22/2019 09:08 (7), 01/15/2021 14:13 (2), 01/15/2021 14:19 (3), 12/30/2022 17:28 (3), 12/30/2022 17:35 (1)
Complete: 🔍

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