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Fencer Vulns
medium 6.5

CVE-2020-29242 json

dhowden tag panic due to out-of-bounds read

published 2020-12-28 5 y ago modified 2026-06-17 4 mo ago also CVE-2020-29243 , CVE-2020-29244 , CVE-2020-29245 , GHSA-27mh-3343-6hg5 , GHSA-9wm7-rc47-g56m , GHSA-9xm8-8qvc-vw3p , GHSA-wg79-2cgp-qrjm , GO-2021-0097 , EUVD-2023-0683

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

dhowden tag before 2020-11-19 allows "panic: runtime error: index out of range" via readPICFrame.

Patch / fix

  • go github.com/dhowden/tag 0.0.0-20201120070457-d52dcb253c63
  • tag_project tag 2020-11-19

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/dhowden/tag/issues/77 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Affected packages

ecosystem package affected fixed in
go github.com/dhowden/tag
<0.0.0-20201120070457-d52dcb253c63
0.0.0-20201120070457-d52dcb253c63

Classification

Weakness
  • CWE-129 Improper Validation of Array Index

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.