Net::Dropbear versions through 0.16 for Perl contains a dependency that may be susceptible to an integer overflow. Net::Dropbear embeds a version of the libtommath library that is susceptible to an integer overflow associated with CVE-2023-36328.

• https://github.com/advisories/GHSA-j3xv-6967-cv88
• https://github.com/libtom/libtommath/pull/546
• https://metacpan.org/release/ATRODO/Net-Dropbear-0.16/source/dropbear/libtommath/bn_mp_grow.c
• https://www.cve.org/CVERecord?id=CVE-2023-36328

Dropbear 2011.54 through 2018.76 has an inconsistent failure delay that may lead to revealing valid usernames, a different issue than CVE-2018-15599.

• https://metacpan.org/release/ATRODO/Net-Dropbear-0.15/changes
• https://matt.ucc.asn.au/dropbear/CHANGES

The rsa_verify_hash_ex function in rsa_verify_hash.c in LibTomCrypt, as used in OP-TEE before 2.2.0, does not validate that the message length is equal to the ASN.1 encoded data length, which makes it easier for remote attackers to forge RSA signatures or public certificates by leveraging a Bleichenbacher signature forgery attack.

• https://www.op-tee.org/advisories/
• https://github.com/libtom/libtomcrypt/commit/5eb9743410ce4657e9d54fef26a2ee31a1b5dd0
• https://bugzilla.redhat.com/show_bug.cgi?id=1370955