Bugzilla – Bug 1227239
VUL-0: CVE-2024-34703: MozillaThunderbird: Botan: denial of service due to overly large elliptic curve parameters
Last modified: 2024-07-12 12:30:09 UTC
+++ This bug was initially created as a clone of Bug #1227238 +++ Botan is a C++ cryptography library. X.509 certificates can identify elliptic curves using either an object identifier or using explicit encoding of the parameters. Prior to versions 3.3.0 and 2.19.4, an attacker could present an ECDSA X.509 certificate using explicit encoding where the parameters are very large. The proof of concept used a 16Kbit prime for this purpose. When parsing, the parameter is checked to be prime, causing excessive computation. This was patched in 2.19.4 and 3.3.0 to allow the prime parameter of the elliptic curve to be at most 521 bits. No known workarounds are available. Note that support for explicit encoding of elliptic curve parameters is deprecated in Botan. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-34703 https://www.cve.org/CVERecord?id=CVE-2024-34703 https://github.com/randombit/botan/commit/08c404b23740babee1f6aa51b54e966029aadee4 https://github.com/randombit/botan/commit/94e9154c143aa5264da6254a6a1be5bc66ee2b5a https://github.com/randombit/botan/security/advisories/GHSA-w4g2-7m2h-7xj7 https://bugzilla.redhat.com/show_bug.cgi?id=2294868
The upstream fix applies cleanly to the vendored botan-version. I will prepare submissions.
SUSE-SU-2024:2415-1: An update that solves one vulnerability and has one security fix can now be installed. Category: security (moderate) Bug References: 1226495, 1227239 CVE References: CVE-2024-34703 Maintenance Incident: [SUSE:Maintenance:34542](https://smelt.suse.de/incident/34542/) Sources used: openSUSE Leap 15.5 (src): MozillaThunderbird-115.12.2-150200.8.168.1 openSUSE Leap 15.6 (src): MozillaThunderbird-115.12.2-150200.8.168.1 SUSE Package Hub 15 15-SP5 (src): MozillaThunderbird-115.12.2-150200.8.168.1 SUSE Package Hub 15 15-SP6 (src): MozillaThunderbird-115.12.2-150200.8.168.1 SUSE Linux Enterprise Desktop 15 SP4 LTSS 15-SP4 (src): MozillaThunderbird-115.12.2-150200.8.168.1 SUSE Linux Enterprise Workstation Extension 15 SP5 (src): MozillaThunderbird-115.12.2-150200.8.168.1 SUSE Linux Enterprise Workstation Extension 15 SP6 (src): MozillaThunderbird-115.12.2-150200.8.168.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.