| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47086: phonet/pep: refuse to enable an unbound pipe |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| phonet/pep: refuse to enable an unbound pipe |
| |
| This ioctl() implicitly assumed that the socket was already bound to |
| a valid local socket name, i.e. Phonet object. If the socket was not |
| bound, two separate problems would occur: |
| |
| 1) We'd send an pipe enablement request with an invalid source object. |
| 2) Later socket calls could BUG on the socket unexpectedly being |
| connected yet not bound to a valid object. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47086 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.3 with commit bdb6e697b2a76c541960b86ab8fda88f3de1adf2 and fixed in 4.4.297 with commit 0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 |
| Issue introduced in 3.3 with commit bdb6e697b2a76c541960b86ab8fda88f3de1adf2 and fixed in 4.9.295 with commit b10c7d745615a092a50c2e03ce70446d2bec2aca |
| Issue introduced in 3.3 with commit bdb6e697b2a76c541960b86ab8fda88f3de1adf2 and fixed in 4.14.260 with commit 311601f114859d586d5ef8833d60d3aa23282161 |
| Issue introduced in 3.3 with commit bdb6e697b2a76c541960b86ab8fda88f3de1adf2 and fixed in 4.19.223 with commit 982b6ba1ce626ef87e5c29f26f2401897554f235 |
| Issue introduced in 3.3 with commit bdb6e697b2a76c541960b86ab8fda88f3de1adf2 and fixed in 5.4.169 with commit 48c76fc53582e7f13c1e0b11c916e503256c4d0b |
| Issue introduced in 3.3 with commit bdb6e697b2a76c541960b86ab8fda88f3de1adf2 and fixed in 5.10.89 with commit 52ad5da8e316fa11e3a50b3f089aa63e4089bf52 |
| Issue introduced in 3.3 with commit bdb6e697b2a76c541960b86ab8fda88f3de1adf2 and fixed in 5.15.12 with commit 53ccdc73eedaf0e922c45b569b797d2796fbaafa |
| Issue introduced in 3.3 with commit bdb6e697b2a76c541960b86ab8fda88f3de1adf2 and fixed in 5.16 with commit 75a2f31520095600f650597c0ac41f48b5ba0068 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2021-47086 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/phonet/pep.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 |
| https://git.kernel.org/stable/c/b10c7d745615a092a50c2e03ce70446d2bec2aca |
| https://git.kernel.org/stable/c/311601f114859d586d5ef8833d60d3aa23282161 |
| https://git.kernel.org/stable/c/982b6ba1ce626ef87e5c29f26f2401897554f235 |
| https://git.kernel.org/stable/c/48c76fc53582e7f13c1e0b11c916e503256c4d0b |
| https://git.kernel.org/stable/c/52ad5da8e316fa11e3a50b3f089aa63e4089bf52 |
| https://git.kernel.org/stable/c/53ccdc73eedaf0e922c45b569b797d2796fbaafa |
| https://git.kernel.org/stable/c/75a2f31520095600f650597c0ac41f48b5ba0068 |
