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_service:tar_scm:backport-CVE-2023-50868.patch
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File _service:tar_scm:backport-CVE-2023-50868.patch of Package systemd
From 572692f0bdd6a3fabe3dd4a3e8e5565cc69b5e14 Mon Sep 17 00:00:00 2001 From: Ronan Pigott <ronan@rjp.ie> Date: Sun, 25 Feb 2024 00:23:32 -0700 Subject: [PATCH] resolved: reduce the maximum nsec3 iterations to 100 According to RFC9267, the 2500 value is not helpful, and in fact it can be harmful to permit a large number of iterations. Combined with limits on the number of signature validations, I expect this will mitigate the impact of maliciously crafted domains designed to cause excessive cryptographic work. (cherry picked from commit eba291124bc11f03732d1fc468db3bfac069f9cb) Conflict:NA Reference:https://github.com/systemd/systemd-stable/commit/572692f0bdd6a3fabe3dd4a3e8e5565cc69b5e14 --- src/resolve/resolved-dns-dnssec.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/resolve/resolved-dns-dnssec.c b/src/resolve/resolved-dns-dnssec.c index aa87820dca..a192d82083 100644 --- a/src/resolve/resolved-dns-dnssec.c +++ b/src/resolve/resolved-dns-dnssec.c @@ -28,8 +28,9 @@ DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(EC_KEY*, EC_KEY_free, NULL); /* Permit a maximum clock skew of 1h 10min. This should be enough to deal with DST confusion */ #define SKEW_MAX (1*USEC_PER_HOUR + 10*USEC_PER_MINUTE) -/* Maximum number of NSEC3 iterations we'll do. RFC5155 says 2500 shall be the maximum useful value */ -#define NSEC3_ITERATIONS_MAX 2500 +/* Maximum number of NSEC3 iterations we'll do. RFC5155 says 2500 shall be the maximum useful value, but + * RFC9276 § 3.2 says that we should reduce the acceptable iteration count */ +#define NSEC3_ITERATIONS_MAX 100 /* * The DNSSEC Chain of trust: -- 2.33.0
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