elfutils 0.170 ebldynamictagname.c ebl_dynamic_tag_name memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

A vulnerability was found in elfutils 0.170 and classified as critical. This issue affects the function ebl_dynamic_tag_name of the file libebl/ebldynamictagname.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

elfutils 0.170 has a buffer over-read in the ebl_dynamic_tag_name function of libebl/ebldynamictagname.c because SYMTAB_SHNDX is unsupported.

The bug was discovered 03/16/2018. The weakness was published 03/18/2018 as Bug 22976 as not defined bug report (Bugzilla). It is possible to read the advisory at sourceware.org. The identification of this vulnerability is CVE-2018-8769 since 03/18/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 120929 (Fedora 28 : elfutils (2018-f91531043d)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277384 (Fedora Security Update for elfutils (FEDORA-2018-f91531043d)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (120929).

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 120929
Nessus Name: Fedora 28 : elfutils (2018-f91531043d)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Timelineinfo

03/16/2018 🔍
03/18/2018 +2 days 🔍
03/18/2018 +0 days 🔍
03/18/2018 +0 days 🔍
03/19/2018 +1 days 🔍
06/08/2018 +81 days 🔍
01/03/2019 +209 days 🔍
01/14/2020 +376 days 🔍

Sourcesinfo

Advisory: Bug 22976
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-8769 (🔍)

Entryinfo

Created: 03/19/2018 07:56
Updated: 01/14/2020 17:02
Changes: 03/19/2018 07:56 (68), 01/14/2020 17:02 (8)
Complete: 🔍

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