7.5

CVE-2022-41556: fedoraproject fedora

CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2022-41556openSUSE-SU-2022:10140-1UBUNTU-CVE-2022-41556
Published 06-10-2022Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2022-41556 is a high (CVSS 7.5) vulnerability in fedoraproject fedora. EPSS estimates a 3.77% chance of exploitation in the next 30 days, higher than 89.8% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
3.77%
0%100%
Low · +0.86 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 3 · Related 1
DSA-5243-1MGASA-2022-0369USN-5903-1

Timeline

  1. 06-10-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

3.77%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

+0.86 pp

From 2.92% on 19-09-2026

19-09-202619-10-2026
EPSS score
3.77%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Lighttpd1.4

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Opensuse3 products
  • lighttpd&distro=openSUSE Leap 15.3< 1.4.67-bp154.2.6.1
  • lighttpd&distro=openSUSE Leap 15.4< 1.4.67-bp154.2.6.1
  • lighttpd&distro=openSUSE Tumbleweed< 1.4.67-2.1
Suse2 products
  • lighttpd&distro=SUSE Package Hub 15 SP3< 1.4.67-bp154.2.6.1
  • lighttpd&distro=SUSE Package Hub 15 SP4< 1.4.67-bp154.2.6.1
Alpine1 product
  • lighttpd≥ 1.4.56, < 1.4.67-r0
Debian1 product
  • lighttpd< 1.4.67-1
Fedoraproject1 product
Lighttpd1 product
Ubuntu1 product
  • lighttpdAll versions (No fix recorded) | < 1.4.63-1ubuntu3.1

7 vendors · 10 products

References

13 links
Show all 13 references