Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: squashfs: Add dictionary size range check to prevent shift-out-of-bounds When an abnormal SquashFS image (COMP_OPTS flag is 1 but dictionary size is 0) is mounted, and performs shift operations using dictionarysize, the shift exponent is -1, causing a shift-out-of-bounds. Detail as below: squashfs_comp_opts(msblk, buffer, length) squashfs_xz_comp_opts() if (comp_opts) n = ffs(opts->dict_size) - 1;<----opts->dict_size=0, n=-1 if (opts->dict_size != (1 << n) && opts->dict_size != (1 << n) + (1 << (n + 1))) <----shift-out-of-bounds Fix it by adding a dictionary size range check before the shift operation.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ff750311d30acc9564ef577050794953eee59f01 before b02948a23455f8190a53887b2d2c13ae1d360cea; affected ff750311d30acc9564ef577050794953eee59f01 before 9d9c5c218ea356a1d88765214ad2919605280ab1; affected ff750311d30acc9564ef577050794953eee59f01 before 7a1c293e7aa17f1afaee0684e0e931fe23a5a6b1; affected ff750311d30acc9564ef577050794953eee59f01 before c68e0068a236f9a7dfc19720bdf11e5d80a85089; affected ff750311d30acc9564ef577050794953eee59f01 before 88c673a0bd233df44ca0020da82f4fd3876de27a; affected ff750311d30acc9564ef577050794953eee59f01 before 0cb85377daaefb4ce5ce72975f2deb27ee0e0cad; affected ff750311d30acc9564ef577050794953eee59f01 before e1ca4e3a380ef3e8f46ce006f1146392e3f32c98; affected ff750311d30acc9564ef577050794953eee59f01 before 1f7745fb3580152ca902ef181b605f33cabfb1d0 |
| Linux / Linux | affected 2.6.39; unaffected 0 before 2.6.39; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b02948a23455f8190a53887b2d2c13ae1d360cea
- https://git.kernel.org/stable/c/9d9c5c218ea356a1d88765214ad2919605280ab1
- https://git.kernel.org/stable/c/7a1c293e7aa17f1afaee0684e0e931fe23a5a6b1
- https://git.kernel.org/stable/c/c68e0068a236f9a7dfc19720bdf11e5d80a85089
- https://git.kernel.org/stable/c/88c673a0bd233df44ca0020da82f4fd3876de27a
- https://git.kernel.org/stable/c/0cb85377daaefb4ce5ce72975f2deb27ee0e0cad
- https://git.kernel.org/stable/c/e1ca4e3a380ef3e8f46ce006f1146392e3f32c98
- https://git.kernel.org/stable/c/1f7745fb3580152ca902ef181b605f33cabfb1d0