BBOT's unarchive module rejects archives containing symlink entries before extraction, but for zip and 7z archives it failed to detect symlinks whose listing carries a DOS-attribute prefix before the unix mode, as produced by legacy versions of p7zip. Such an archive, downloaded and extracted during a scan (for example via filedownload), bypassed the guard and caused an attacker-controlled symlink to be written into the extraction directory. The effect is limited to planting the symlink (its target is not written through), and only hosts using such a legacy p7zip build are affected; current mainline 7-Zip is not.
Fix
Patch, vendor advisory and mitigation references on NVD 1
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 3.1 · blacklanternsecurityNVD modified 2026-10-25 20:10
Affected (CPE criteria) 63
cpe:2.3:a:blacklanternsecurity:bbot:*:*:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.0:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.647:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.649:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.652:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.654:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.659:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.669:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.671:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.673:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.691:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.765:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.767:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.773:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.782:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.786:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.793:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.795:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.798:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.819:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.821:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.829:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.836:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.849:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.851:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.858:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.870:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.876:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.884:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.897:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.903:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.907:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.909:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.981:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.986:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.1056:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.1062:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.1064:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.1068:rc:*:*:*:*:*:*cpe:2.3:a:blacklanternsecurity:bbot:3.0.0.1070:rc:*:*:*:*:*:*- and 23 more