CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.3 | $0-$5k | 0.00 |
A vulnerability classified as problematic has been found in lighttpd up to 1.4.66 (Web Server). This affects an unknown function of the file gw_backend.c of the component TCP Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:
A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.
The weakness was released 10/06/2022 as 115. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2022-41556 since 09/26/2022. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.
Upgrading to version 1.4.67 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch b18de6f9264f914f7bf493abd3b6059343548e50 is able to eliminate this problem. The bugfix is ready for download at git.lighttpd.net. The best possible mitigation is suggested to be upgrading to the latest version.
Product
Type
Name
Version
- 1.4.0
- 1.4.1
- 1.4.2
- 1.4.3
- 1.4.4
- 1.4.5
- 1.4.6
- 1.4.7
- 1.4.8
- 1.4.9
- 1.4.10
- 1.4.11
- 1.4.12
- 1.4.13
- 1.4.14
- 1.4.15
- 1.4.16
- 1.4.17
- 1.4.18
- 1.4.19
- 1.4.20
- 1.4.21
- 1.4.22
- 1.4.23
- 1.4.24
- 1.4.25
- 1.4.26
- 1.4.27
- 1.4.28
- 1.4.29
- 1.4.30
- 1.4.31
- 1.4.32
- 1.4.33
- 1.4.34
- 1.4.35
- 1.4.36
- 1.4.37
- 1.4.38
- 1.4.39
- 1.4.40
- 1.4.41
- 1.4.42
- 1.4.43
- 1.4.44
- 1.4.45
- 1.4.46
- 1.4.47
- 1.4.48
- 1.4.49
- 1.4.50
- 1.4.51
- 1.4.52
- 1.4.53
- 1.4.54
- 1.4.55
- 1.4.56
- 1.4.57
- 1.4.58
- 1.4.59
- 1.4.60
- 1.4.61
- 1.4.62
- 1.4.63
- 1.4.64
- 1.4.65
- 1.4.66
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: 6.4VulDB Meta Temp Score: 6.3
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
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: 🔍
Exploiting
Class: Denial of serviceCWE: CWE-404
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 |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: lighttpd 1.4.67
Patch: b18de6f9264f914f7bf493abd3b6059343548e50
Timeline
09/26/2022 🔍10/06/2022 🔍
10/06/2022 🔍
10/30/2022 🔍
Sources
Advisory: 115Status: Confirmed
CVE: CVE-2022-41556 (🔍)
Entry
Created: 10/06/2022 22:48Updated: 10/30/2022 17:25
Changes: 10/06/2022 22:48 (45), 10/30/2022 17:25 (11)
Complete: 🔍
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