[oss-security] CVE-2024-31497: Secret Key Recovery of NIST P-521 Private Keys Through Biased ECDSA Nonces in PuTTY Client

2024-04-15 Thread Fabian Bäumer
### Summary The PuTTY client and all related components generate heavily biased ECDSA nonces in the case of NIST P-521. To be more precise, the first 9 bits of each ECDSA nonce are zero. This allows for full secret key recovery in roughly 60 signatures by using state-of-the-art techniques. Th

Re: [oss-security] Linux: Disabling network namespaces

2024-04-15 Thread Simon McVittie
On Mon, 15 Apr 2024 at 17:13:09 +0200, Solar Designer wrote: > And/or make Debian's > kernel.unprivileged_userns_clone official upstream and use that. Why > did Debian choose to deprecate (but not yet drop?) theirs and go with > upstream's user.max_user_namespaces, which doesn't provide exactly th

Re: [oss-security] Linux: Disabling network namespaces

2024-04-15 Thread Simon McVittie
On Sun, 14 Apr 2024 at 21:08:55 +0200, Solar Designer forwarded: > Some other container runtimes such as Docker and Podman do make use > of network namespaces by default. As an example of a less traditional container environment, Flatpak optionally uses network namespaces (as implemented by bubble

Re: [oss-security] Linux: Disabling network namespaces

2024-04-15 Thread Solar Designer
On Sun, Apr 14, 2024 at 06:47:26PM -0400, Demi Marie Obenour wrote: > On Sun, Apr 14, 2024 at 09:08:55PM +0200, Solar Designer wrote: > > Fredrik Nystrom on Rocky Linux Mattermost channel Security pointed out > > that it is reasonable to disable just network namespaces with > > user.max_net_namespa

Re: [oss-security] Linux: Disabling network namespaces

2024-04-15 Thread Demi Marie Obenour
On Sun, Apr 14, 2024 at 09:08:55PM +0200, Solar Designer wrote: > Hi, > > Many Linux kernel vulnerabilities including the recently exploited > Netfilter CVE-2024-1086 require CAP_NET_ADMIN in a namespace, yet a > typically recommended mitigation is to disable user namespaces (not just > network na

[oss-security] Re: less(1) with LESSOPEN mishandles \n in paths

2024-04-15 Thread Jakub Wilk
* Jakub Wilk , 2024-04-12 14:20: less(1) does not correctly escape newlines in pathnames when constructing command line of the input preprocessor. CVE-2024-32487 was assigned to this bug. -- Jakub Wilk