CVE-2020-5238

EUVD-2020-26457
The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes O(n * n) time to parse certain inputs. An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service. This issue does not affect the upstream cmark project. The issue has been fixed in version 0.29.0.gfm.1.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
GitHub_MCNA
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 65%
Affected Products (NVD)
VendorProductVersion
github_flavored_markdown_projectgithub_flavored_markdown
𝑥
< 0.29.0.gfm.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
cmark-gfm
bookworm
0.29.0.gfm.6-6
fixed
bullseye
no-dsa
buster
no-dsa
sid
0.29.0.gfm.6-6
fixed
trixie
0.29.0.gfm.6-6
fixed
haskell-cmark-gfm
bookworm
0.2.5+ds1-1
fixed
bullseye
0.2.1+ds1-1
no-dsa
buster
no-dsa
sid
0.2.5+ds1-3
fixed
trixie
0.2.5+ds1-3
fixed
python-cmarkgfm
bookworm
0.8.0-3
fixed
bullseye
no-dsa
buster
no-dsa
sid
0.8.0-3
fixed
trixie
0.8.0-3
fixed
r-cran-commonmark
bookworm
1.8.1-1
fixed
bullseye
no-dsa
buster
no-dsa
sid
1.9.2-1
fixed
trixie
1.9.1-1
fixed
ruby-commonmarker
bookworm
0.23.6-1
fixed
bullseye
0.21.0-1
no-dsa
buster
no-dsa
sid
0.23.10-1
fixed
trixie
0.23.10-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
cmark-gfm
bionic
dne
focal
needs-triage
groovy
ignored
hirsute
ignored
impish
ignored
jammy
needs-triage
kinetic
ignored
lunar
ignored
mantic
ignored
noble
needs-triage
trusty
dne
xenial
dne
haskell-cmark-gfm
bionic
dne
focal
needs-triage
groovy
ignored
hirsute
ignored
impish
ignored
jammy
needs-triage
kinetic
ignored
lunar
ignored
mantic
ignored
noble
needs-triage
trusty
dne
xenial
dne
python-cmarkgfm
bionic
dne
focal
needs-triage
groovy
ignored
hirsute
ignored
impish
ignored
jammy
needs-triage
kinetic
ignored
lunar
ignored
mantic
ignored
noble
needs-triage
trusty
dne
xenial
dne
r-cran-commonmark
bionic
dne
focal
needs-triage
groovy
ignored
hirsute
ignored
impish
ignored
jammy
needs-triage
kinetic
ignored
lunar
ignored
mantic
ignored
noble
needs-triage
trusty
dne
xenial
dne
ruby-commonmarker
bionic
dne
focal
needs-triage
groovy
not-affected
hirsute
not-affected
impish
not-affected
jammy
not-affected
kinetic
not-affected
lunar
not-affected
mantic
not-affected
noble
not-affected
trusty
dne
xenial
dne
Common Weakness Enumeration
References
https://github.com/github/cmark-gfm/commit/85d895289c5ab67f988ca659493a64abb5fec7b4
https://github.com/github/cmark-gfm/security/advisories/GHSA-7gc6-9qr5-hc85
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/
https://github.com/github/cmark-gfm/commit/85d895289c5ab67f988ca659493a64abb5fec7b4
https://github.com/github/cmark-gfm/security/advisories/GHSA-7gc6-9qr5-hc85
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/