GNU C Library up to 2.28 getaddrinfo Hostname input validation
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
7.3 | $0-$5k | 0.00 |
A vulnerability was found in GNU C Library up to 2.28 (Software Library). It has been declared as critical. Affected by this vulnerability is the function getaddrinfo
. The manipulation as part of a Hostname 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 availability. The summary by CVE is:
In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.
The bug was discovered 11/27/2018. The weakness was published 12/04/2018 (Website). The advisory is shared at lists.fedoraproject.org. This vulnerability is known as CVE-2018-19591 since 11/26/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.
The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 120918 (Fedora 29 : glibc (2018-f6b7df660d)), 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 351477 (Amazon Linux Security Advisory for glibc: ALAS2-2019-1140).
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 vulnerability database at Tenable (120918).
Product
Type
Vendor
Name
Version
- 2.0
- 2.1
- 2.2
- 2.3
- 2.4
- 2.5
- 2.6
- 2.7
- 2.8
- 2.9
- 2.10
- 2.11
- 2.12
- 2.13
- 2.14
- 2.15
- 2.16
- 2.17
- 2.18
- 2.19
- 2.20
- 2.21
- 2.22
- 2.23
- 2.24
- 2.25
- 2.26
- 2.27
- 2.28
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.5VulDB Meta Temp Score: 7.3
VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Input validationCWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 120918
Nessus Name: Fedora 29 : glibc (2018-f6b7df660d)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Patch: d527c860f5a3f0ed687bd03f0cb464612dc23408
Timeline
11/26/2018 🔍11/27/2018 🔍
11/27/2018 🔍
11/30/2018 🔍
12/04/2018 🔍
12/04/2018 🔍
12/05/2018 🔍
01/03/2019 🔍
06/12/2023 🔍
Sources
Vendor: gnu.orgAdvisory: FEDORA-2018-f6b7df660d
Status: Not defined
Confirmation: 🔍
CVE: CVE-2018-19591 (🔍)
SecurityTracker: 1042174
SecurityFocus: 106037 - GNU glibc 'sysdeps/unix/sysv/linux/if_index.c' Remote Denial of Service Vulnerability
Entry
Created: 12/05/2018 08:13Updated: 06/12/2023 16:19
Changes: 12/05/2018 08:13 (73), 04/17/2020 10:56 (5), 06/12/2023 16:12 (7), 06/12/2023 16:19 (1)
Complete: 🔍
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