CVE-2020-26148

unknown

Published — · Modified —

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2020-26148 NameCVE-2020-26148 Descriptionmd_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document. SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)…

CVE-2020-26148

Name	CVE-2020-26148
Description	md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	971396

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
md4c (PTS)	bullseye	0.4.7-2	fixed
	bookworm	0.4.8-1	fixed
	trixie	0.5.2-2	fixed
	forky, sid	0.5.3-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
md4c	source	(unstable)	0.4.5-2			971396

Notes

https://github.com/mity/md4c/issues/130
https://github.com/mity/md4c/commit/22ca89a3008966c4316d6b0a158b1a49f9038df0

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

https://github.com/mity/md4c/issues/130https://github.com/mity/md4c/commit/22ca89a3008966c4316d6b0a158b1a49f9038df0

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`0.4.5-2`
debian	bullseye	fixed	`0.4.5-2`
debian	forky	fixed	`0.4.5-2`
debian	sid	fixed	`0.4.5-2`
debian	trixie	fixed	`0.4.5-2`

References

https://security-tracker.debian.org/tracker/CVE-2020-26148

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.