Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: media: s2255: bound JPEG frame size before copying into the buffer s2255_fillbuff() memcpy()s vc->jpg_size bytes of a captured JPEG/MJPEG frame into the vb2 plane. vc->jpg_size is taken verbatim from the S2255_MARKER_FRAME header the device sends (pdword[4] in save_frame()) and, unlike the frame payload length just above it, is never bounded: payload = le32_to_cpu(pdword[3]); if (payload > vc->req_image_size) /* payload is checked ... */ return -EINVAL; vc->pkt_size = payload; vc->jpg_size = le32_to_cpu(pdword[4]); /* ... jpg_size is not */ A malicious or malfunctioning device can therefore report a jpg_size larger than the destination vb2 plane, and the memcpy() writes past it. jpg_size is a signed int, so a value with the top bit set also turns into a huge length. Reject a frame whose jpg_size is negative or exceeds the plane size before copying it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before 32a595dd3e8634544e5cfbc47f906dff3d3c1ef8; affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before 4b6f7bccc6559ae5c54573c284fe76eafc9989b2; affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before 2542516a147bfad740e7e411c251b639fad260ff; affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before 79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77; affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before d2ecaaab6a4f165abb54cdf61be60030b5782bf8; affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before 68d664f1b4efe525e99154b7058fcb0378bdaff7; affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before dd739517560c8d0ec4463a53e717bf40b988d7da; affected 38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7 before e504cc888f42999dd76b6a43788c422610f2aad2 |
| Linux / Linux | affected 2.6.27; unaffected 0 before 2.6.27; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/32a595dd3e8634544e5cfbc47f906dff3d3c1ef8
- https://git.kernel.org/stable/c/4b6f7bccc6559ae5c54573c284fe76eafc9989b2
- https://git.kernel.org/stable/c/2542516a147bfad740e7e411c251b639fad260ff
- https://git.kernel.org/stable/c/79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77
- https://git.kernel.org/stable/c/d2ecaaab6a4f165abb54cdf61be60030b5782bf8
- https://git.kernel.org/stable/c/68d664f1b4efe525e99154b7058fcb0378bdaff7
- https://git.kernel.org/stable/c/dd739517560c8d0ec4463a53e717bf40b988d7da
- https://git.kernel.org/stable/c/e504cc888f42999dd76b6a43788c422610f2aad2