Unrated severityNVD Advisory· Published Jan 1, 1999· Updated Jun 16, 2026

CVE-1999-0656

Description

The ugidd RPC interface, by design, allows remote attackers to enumerate valid usernames by specifying arbitrary UIDs that ugidd maps to local user and group names.

Affected products

Linux/Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
osv-coords77 versions
pkg:apk/chainguard/hyperv-daemons pkg:apk/chainguard/hyperv-daemons-6.12 pkg:apk/chainguard/hyperv-daemons-6.18 pkg:apk/chainguard/hyperv-daemons-generic pkg:apk/chainguard/linux pkg:apk/chainguard/linux-aws-6.12 pkg:apk/chainguard/linux-aws-6.12-boot-installed pkg:apk/chainguard/linux-aws-6.12-fips-boot-installed pkg:apk/chainguard/linux-aws-6.12-headers pkg:apk/chainguard/linux-aws-6.12-modules pkg:apk/chainguard/linux-aws-6.18 pkg:apk/chainguard/linux-aws-6.18-boot-installed pkg:apk/chainguard/linux-aws-6.18-fips-boot-installed pkg:apk/chainguard/linux-aws-6.18-headers pkg:apk/chainguard/linux-aws-6.18-modules pkg:apk/chainguard/linux-aws-generic pkg:apk/chainguard/linux-aws-generic-boot-configuration pkg:apk/chainguard/linux-aws-generic-boot-installed pkg:apk/chainguard/linux-aws-generic-fips-boot-installed pkg:apk/chainguard/linux-aws-generic-headers pkg:apk/chainguard/linux-aws-generic-modules pkg:apk/chainguard/linux-azure-6.12 pkg:apk/chainguard/linux-azure-6.12-boot-installed pkg:apk/chainguard/linux-azure-6.12-fips-boot-installed pkg:apk/chainguard/linux-azure-6.12-headers pkg:apk/chainguard/linux-azure-6.12-modules pkg:apk/chainguard/linux-azure-6.18 pkg:apk/chainguard/linux-azure-6.18-boot-installed pkg:apk/chainguard/linux-azure-6.18-fips-boot-installed pkg:apk/chainguard/linux-azure-6.18-headers pkg:apk/chainguard/linux-azure-6.18-modules pkg:apk/chainguard/linux-azure-generic pkg:apk/chainguard/linux-azure-generic-boot-configuration pkg:apk/chainguard/linux-azure-generic-boot-installed pkg:apk/chainguard/linux-azure-generic-fips-boot-installed pkg:apk/chainguard/linux-azure-generic-headers pkg:apk/chainguard/linux-azure-generic-modules pkg:apk/chainguard/linux-boot-configuration pkg:apk/chainguard/linux-boot-installed pkg:apk/chainguard/linux-gcp-6.12 pkg:apk/chainguard/linux-gcp-6.12-boot-installed pkg:apk/chainguard/linux-gcp-6.12-fips-boot-installed pkg:apk/chainguard/linux-gcp-6.12-headers pkg:apk/chainguard/linux-gcp-6.12-modules pkg:apk/chainguard/linux-gcp-6.18 pkg:apk/chainguard/linux-gcp-6.18-boot-installed pkg:apk/chainguard/linux-gcp-6.18-fips-boot-installed pkg:apk/chainguard/linux-gcp-6.18-headers pkg:apk/chainguard/linux-gcp-6.18-modules pkg:apk/chainguard/linux-gcp-64k pkg:apk/chainguard/linux-gcp-64k-boot-installed pkg:apk/chainguard/linux-gcp-64k-modules pkg:apk/chainguard/linux-gcp-generic pkg:apk/chainguard/linux-gcp-generic-boot-installed pkg:apk/chainguard/linux-gcp-generic-fips-boot-installed pkg:apk/chainguard/linux-gcp-generic-headers pkg:apk/chainguard/linux-gcp-generic-modules pkg:apk/chainguard/linux-modules pkg:apk/chainguard/linux-qemu-6.12 pkg:apk/chainguard/linux-qemu-6.18 pkg:apk/chainguard/linux-qemu-generic pkg:apk/chainguard/linux-qemu-generic-bootc-boot-installed pkg:apk/chainguard/linux-qemu-generic-boot-installed pkg:apk/chainguard/linux-qemu-generic-fips-boot-installed pkg:apk/chainguard/linux-qemu-generic-headers pkg:apk/chainguard/linux-qemu-generic-modules pkg:apk/chainguard/linux-qemu-rc pkg:apk/chainguard/linux-qemu-rc-boot-installed pkg:apk/chainguard/linux-qemu-rc-fips-boot-installed pkg:apk/chainguard/linux-qemu-rc-headers pkg:apk/chainguard/linux-qemu-rc-modules pkg:apk/chainguard/linux-vmware-6.18 pkg:apk/chainguard/linux-vmware-generic pkg:apk/chainguard/linux-vmware-generic-boot-installed pkg:apk/chainguard/linux-vmware-generic-fips-boot-installed pkg:apk/chainguard/linux-vmware-generic-headers pkg:apk/chainguard/linux-vmware-generic-modules
< 0+ 76 more
- (no CPE)range: < 0
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- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 6.12.67-r0
- (no CPE)range: < 6.18.7-r0
- (no CPE)range: < 0
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- (no CPE)range: < 0
- (no CPE)range: < 0
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- (no CPE)range: < 0
- (no CPE)range: < 6.17_rc5-r0
- (no CPE)range: < 6.17_rc5-r0
- (no CPE)range: < 6.17_rc5-r0
- (no CPE)range: < 6.17_rc5-r0
- (no CPE)range: < 6.17_rc5-r0
- (no CPE)range: < 6.18.7-r0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0
- (no CPE)range: < 0

cvss	0.000
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

CVE-1999-0656

Description

Affected products

Patches

Vulnerability mechanics

References

News mentions