CVE-2023-2977
This security flaw cause a buffer overrun vulnerability in pkcs15 cardos_have_verifyrc_package.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A vulnerbility was found in OpenSC. This security flaw cause a buffer overrun vulnerability in pkcs15 cardos_have_verifyrc_package. The attacker can supply a smart card package with malformed ASN1 context. The cardos_have_verifyrc_package function scans the ASN1 buffer for 2 tags, where remaining length is wrongly caculated due to moved starting pointer. This leads to possible heap-based buffer oob read. In cases where ASAN is enabled while compiling this causes a crash. Further info leak or more damage is possible.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.29% probability · 22th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-125
- Affected
- opensc project/opensc · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/security/cve/CVE-2023-2977Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2211088Issue Tracking, Third Party Advisory
- https://github.com/OpenSC/OpenSC/issues/2785Issue Tracking, Patch
- https://github.com/OpenSC/OpenSC/pull/2787Patch
- https://lists.debian.org/debian-lts-announce/2023/06/msg00025.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJD4Q4AJSGE5UIJI7OUYZY4HGGCVYQNI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAR54OV6EHA56B4XJF6RNPQ4HJ2ITU66/
- https://access.redhat.com/security/cve/CVE-2023-2977Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2211088Issue Tracking, Third Party Advisory
- https://github.com/OpenSC/OpenSC/issues/2785Issue Tracking, Patch
- https://github.com/OpenSC/OpenSC/pull/2787Patch
- https://lists.debian.org/debian-lts-announce/2023/06/msg00025.html
- https://lists.debian.org/debian-lts-announce/2024/12/msg00026.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJD4Q4AJSGE5UIJI7OUYZY4HGGCVYQNI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAR54OV6EHA56B4XJF6RNPQ4HJ2ITU66/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.