lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <2024081743-CVE-2024-42283-15a5@gregkh> Date: Sat, 17 Aug 2024 11:09:48 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-42283: net: nexthop: Initialize all fields in dumped nexthops Description =========== In the Linux kernel, the following vulnerability has been resolved: net: nexthop: Initialize all fields in dumped nexthops struct nexthop_grp contains two reserved fields that are not initialized by nla_put_nh_group(), and carry garbage. This can be observed e.g. with strace (edited for clarity): # ip nexthop add id 1 dev lo # ip nexthop add id 101 group 1 # strace -e recvmsg ip nexthop get id 101 ... recvmsg(... [{nla_len=12, nla_type=NHA_GROUP}, [{id=1, weight=0, resvd1=0x69, resvd2=0x67}]] ...) = 52 The fields are reserved and therefore not currently used. But as they are, they leak kernel memory, and the fact they are not just zero complicates repurposing of the fields for new ends. Initialize the full structure. The Linux kernel CVE team has assigned CVE-2024-42283 to this issue. Affected and fixed versions =========================== Issue introduced in 5.3 with commit 430a049190de and fixed in 6.1.103 with commit 1377de719652 Issue introduced in 5.3 with commit 430a049190de and fixed in 6.6.44 with commit 7704460acd7f Issue introduced in 5.3 with commit 430a049190de and fixed in 6.10.3 with commit a13d3864b76a Issue introduced in 5.3 with commit 430a049190de and fixed in 6.11-rc1 with commit 6d745cd0e972 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-2024-42283 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/ipv4/nexthop.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/1377de719652d868f5317ba8398b7e74c5f0430b https://git.kernel.org/stable/c/7704460acd7f5d35eb07c52500987dc9b95313fb https://git.kernel.org/stable/c/a13d3864b76ac87085ec530b2ff8e37482a63a96 https://git.kernel.org/stable/c/6d745cd0e9720282cd291d36b9db528aea18add2
Powered by blists - more mailing lists