Medium severity · published Jan 24, 2023
CVE-2023-22485
cmark-gfm out-of-bounds read in validate_protocol
5.3
CVSS
0.7%
EPSS
No
On KEV
Description
cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior 0.29.0.gfm.7, a crafted markdown document can trigger an out-of-bounds read in the `validate_protocol` function. We believe this bug is harmless in practice, because the out-of-bounds read accesses `malloc` metadata without causing any visible damage.This vulnerability has been patched in 0.29.0.gfm.7.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cmark-gfm · github
< 0.29.0.gfm.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-22485
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-22485
Exploit
https://github.com/github/cmark-gfm/security/advisories/GHSA-c944-cv5f-hpvr
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