CVE-2024-31497 Weak cryptography in n/a

What is CVE-2024-31497?

CVE-2024-31497 is a medium-severity vulnerability in Fedoraproject Fedora, published on 15 Apr 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In PuTTY 0.68 through 0.80 before 0.81, biased ECDSA nonce generation allows an attacker to recover a user's NIST P-521 secret key via a quick attack in approximately 60 signatures. This is especially important in a scenario where an adversary is able to read messages signed by PuTTY or Pageant. The required set of signed messages may be publicly readable because they are stored in a public Git service that supports use of SSH for commit signing, and the signatures were made by Pageant through an agent-forwarding mechanism. In other words, an adversary may already have enough signature information to compromise a victim's private key, even if there is no further use of vulnerable PuTTY versions. After a key compromise, an adversary may be able to conduct supply-chain attacks on software maintained in Git. A second, independent scenario is that the adversary is an operator of an SSH server to which the victim authenticates (for remote login or file copy), even though this server is not fully trusted by the victim, and the victim uses the same private key for SSH connections to other services operated by other entities. Here, the rogue server operator (who would otherwise have no way to determine the victim's private key) can derive the victim's private key, and then use it for unauthorized access to those other services. If the other services include Git services, then again it may be possible to conduct supply-chain attacks on software maintained in Git. This also affects, for example, FileZilla before 3.67.0, WinSCP before 6.3.3, TortoiseGit before 2.15.0.1, and TortoiseSVN through 1.14.6.

Weakness: CWE-338

Which versions are affected by CVE-2024-31497?

It affects 6 products.

Products include Fedoraproject Fedora, Filezilla-Project Filezilla Client, Putty Putty, Tigris Tortoisesvn, Tortoisegit Tortoisegit, Winscp Winscp.

How do I fix CVE-2024-31497?

Upgrade to a fixed version.

Is CVE-2024-31497 being exploited?

There is no known exploitation of CVE-2024-31497 in the wild and no public exploit code.

Public exploit code: 4 proofs of concept on GitHub.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2024-31497, DEBIAN-CVE-2024-31497, DLA-3839-1, GHSA-6p4c-r453-8743, MGASA-2024-0140, UBUNTU-CVE-2024-31497 and 3 more.