Detections
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openSUSE 15 Security Update : putty (openSUSE-SU-2024:0111-1)
medium Nessus Plugin ID 193806
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Synopsis
The remote openSUSE host is missing a security update.Description
The remote openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2024:0111-1 advisory.- 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. (CVE-2024-31497)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected putty package.See Also
Plugin Details
Severity: Medium
ID: 193806
File Name: openSUSE-2024-0111-1.nasl
Version: 1.1
Type: local
Agent: unix
Family: SuSE Local Security Checks
Published: 4/24/2024
Updated: 5/13/2024
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.1
CVSS v2
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.2
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N
CVSS Score Source: CVE-2024-31497
CVSS v3
Risk Factor: Medium
Base Score: 5.9
Temporal Score: 5.3
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:novell:opensuse:15.5, p-cpe:/a:novell:opensuse:putty
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 4/19/2024
Vulnerability Publication Date: 4/15/2024
Reference Information
CVE: CVE-2024-31497
IAVA: 2024-A-0243